Part 1. Firearms and Weapons - General

(1) As used in this article 12, unless the context otherwise requires:
(a) “Adult” means any person eighteen years of age or older.
(a.3) “Ballistic knife” means any knife that has a blade which is forcefully projected from the handle by means of a spring-loaded device or explosive charge.
(a.5) “Blackjack” includes any billy, sand club, sandbag, or other hand-operated striking weapon consisting, at the striking end, of an encased piece of lead or other heavy substance and, at the handle end, a strap or springy shaft which increases the force of impact.
(b) “Bomb” means any explosive or incendiary device or molotov cocktail as defined in section 9-7-103, C.R.S., or any chemical device which causes or can cause an explosion, which is not specifically designed for lawful and legitimate use in the hands of its possessor.
(b.5) “Bureau” means the Colorado bureau of investigation created in section 24-33.5-401, C.R.S.
(c) “Firearm silencer” means any instrument, attachment, weapon, or appliance for causing the firing of any gun, revolver, pistol, or other firearm to be silent or intended to lessen or muffle the noise of the firing of any such weapon.
(d) “Gas gun” means a device designed for projecting gas-filled projectiles which release their contents after having been projected from the device and includes projectiles designed for use in such a device.
(e) Repealed.
(e.5) “Handgun” means a pistol, revolver, or other firearm of any description, loaded or unloaded, from which any shot, bullet, or other missile can be discharged, the length of the barrel of which, not including any revolving, detachable, or magazine breech, does not exceed twelve inches.
(e.7) “Juvenile” means any person under the age of eighteen years.
(f) “Knife” means any dagger, dirk, knife, or stiletto with a blade over three and one-half inches in length, or any other dangerous instrument capable of inflicting cutting, stabbing, or tearing wounds, but does not include a hunting or fishing knife carried for sports use. The issue that a knife is a hunting or fishing knife must be raised as an affirmative defense.
(f.5) “Locking device” means a device that prohibits the operation or discharge of a firearm and that can only be disabled with the use of a key, combination, or biometric data.
(g) “Machine gun” means any firearm, whatever its size and usual designation, that shoots automatically more than one shot, without manual reloading, by a single function of the trigger.
(g.5) “Personalized firearm” means a firearm that has, as part of its original manufacture, incorporated design technology that allows the firearm to be fired only by the authorized user and prevents any of the safety characteristics of the firearm from being readily deactivated by anyone other than the authorized user. The technology limiting the firearm’s operational use may include, but is not limited to, fingerprint verification, magnetic encoding, radio frequency tagging, and other automatic user identification systems utilizing biometric, mechanical, or electronic systems.
(h) “Short rifle” means a rifle having a barrel less than sixteen inches long or an overall length of less than twenty-six inches.
(i) “Short shotgun” means a shotgun having a barrel or barrels less than eighteen inches long or an overall length of less than twenty-six inches.
(i.5) “Stun gun” means a device capable of temporarily immobilizing a person by the infliction of an electrical charge.
(j) Repealed.
(2) It shall be an affirmative defense to any provision of this article that the act was committed by a peace officer in the lawful discharge of his duties.

(1) As used in this section, the term “dangerous weapon” means a firearm silencer, machine gun, short shotgun, short rifle, or ballistic knife.
(2) As used in this section, the term “illegal weapon” means a blackjack, a gas gun, or metallic knuckles.
(3) A person who knowingly possesses a dangerous weapon commits a class 5 felony. Each subsequent violation of this subsection (3) by the same person shall be a class 4 felony.
(4) A person who knowingly possesses an illegal weapon commits a class 1 misdemeanor.
(5) It shall be an affirmative defense to the charge of possessing a dangerous weapon, or to the charge of possessing an illegal weapon, that the person so accused was a peace officer or member of the armed forces of the United States or Colorado National Guard acting in the lawful discharge of his duties, or that said person has a valid permit and license for possession of such weapon.

A person commits a class 1 misdemeanor if he knowingly and unlawfully possesses a firearm, the manufacturer’s serial number of which, or other distinguishing number or identification mark, has been removed, defaced, altered, or destroyed, except by normal wear and tear.

(1) After a judgment of conviction under section 18-12-103 or 18-12-104 has become final, any defaced firearm upon which the judgment was based shall be deemed to be contraband, the possession of which is contrary to the public peace, health, and safety.
(2) Defaced firearms that are deemed to be contraband shall be placed in the possession of the bureau or of a local law enforcement agency designated by the bureau and shall be destroyed or rendered permanently inoperable.

A person commits a class 1 misdemeanor if such person knowingly removes, defaces, covers, alters, or destroys the manufacturer’s serial number or any other distinguishing number or identification mark of a firearm.

(1) [This version of introductory portion to subsection (1) is effective until March 1, 2022.] A person commits a class 2 misdemeanor if such person knowingly and unlawfully:
(1) [This version of introductory portion to subsection (1) is effective March 1, 2022.] A person commits a class 1 misdemeanor if such person knowingly and unlawfully:
(a) Carries a knife concealed on or about his or her person; or
(b) Carries a firearm concealed on or about his or her person; or
(c) Without legal authority, carries, brings, or has in such person’s possession a firearm or any explosive, incendiary, or other dangerous device on the property of or within any building in which the chambers, galleries, or offices of the general assembly, or either house thereof, are located, or in which a legislative hearing or meeting is being or is to be conducted, or in which the official office of any member, officer, or employee of the general assembly is located.
(d) (Deleted by amendment, L. 93, p. 964, § 1, effective July 1, 1993.)
(2) It shall not be an offense if the defendant was:
(a) A person in his or her own dwelling or place of business or on property owned or under his or her control at the time of the act of carrying; or
(b) A person in a private automobile or other private means of conveyance who carries a weapon for lawful protection of such person’s or another’s person or property while traveling; or
(c) A person who, at the time of carrying a concealed weapon, held a valid written permit to carry a concealed weapon issued pursuant to section 18-12-105.1, as it existed prior to its repeal, or, if the weapon involved was a handgun, held a valid permit to carry a concealed handgun or a temporary emergency permit issued pursuant to part 2 of this article; except that it shall be an offense under this section if the person was carrying a concealed handgun in violation of the provisions of section 18-12-214; or
(d) A peace officer, as described in section 16-2.5-101, C.R.S., when carrying a weapon in conformance with the policy of the employing agency as provided in section 16-2.5-101 (2), C.R.S.; or
(e) (Deleted by amendment, L. 2003, p. 1624, § 46, effective August 6, 2003.)
(f) A United States probation officer or a United States pretrial services officer while on duty and serving in the state of Colorado under the authority of rules and regulations promulgated by the judicial conference of the United States.

Source: L. 81:Entire section added, p. 1437, § 4, effective June 8. L. 83:Entire section amended, p. 711, § 1, effective July 1. L. 96:(2) amended, p. 1024, § 1, effective May 23. L. 98:(2) amended, p. 949, § 12, effective May 27. L. 2003:Entire section repealed, p. 648, § 2, effective May 17.

(1) A person commits a class 6 felony if such person knowingly and unlawfully and without legal authority carries, brings, or has in such person’s possession a deadly weapon as defined in section 18-1-901 (3)(e) in or on the real estate and all improvements erected thereon of any public or private elementary, middle, junior high, high, or vocational school or any public or private college, university, or seminary, except for the purpose of presenting an authorized public demonstration or exhibition pursuant to instruction in conjunction with an organized school or class, for the purpose of carrying out the necessary duties and functions of an employee of an educational institution that require the use of a deadly weapon, or for the purpose of participation in an authorized extracurricular activity or on an athletic team.
(2) (Deleted by amendment, L. 2000, p. 709, § 45, effective July 1, 2000.)
(3) It shall not be an offense under this section if:
(a) The weapon is unloaded and remains inside a motor vehicle while upon the real estate of any public or private college, university, or seminary; or
(b) The person is in that person’s own dwelling or place of business or on property owned or under that person’s control at the time of the act of carrying; or
(c) The person is in a private automobile or other private means of conveyance and is carrying a weapon for lawful protection of that person’s or another’s person or property while traveling; or
(d) The person, at the time of carrying a concealed weapon, held a valid written permit to carry a concealed weapon issued pursuant to section 18-12-105.1, as said section existed prior to its repeal; except that it shall be an offense under this section if the person was carrying a concealed handgun in violation of the provisions of section 18-12-214 (3); or
(d.5) The weapon involved was a handgun and the person held a valid permit to carry a concealed handgun or a temporary emergency permit issued pursuant to part 2 of this article; except that it shall be an offense under this section if the person was carrying a concealed handgun in violation of the provisions of section 18-12-214 (3); or
(e) The person is a school resource officer, as defined in section 22-32-109.1 (1)(g.5), C.R.S., or a peace officer, as described in section 16-2.5-101, C.R.S., when carrying a weapon in conformance with the policy of the employing agency as provided in section 16-2.5-101 (2), C.R.S.; or
(f) and (g)(Deleted by amendment, L. 2003, p. 1626, § 51, effective August 6, 2003.)
(h) The person has possession of the weapon for use in an educational program approved by a school which program includes, but shall not be limited to, any course designed for the repair or maintenance of weapons.

(1) The general assembly hereby finds that:
(a) A person carrying a weapon in a private automobile or other private means of conveyance for hunting or for lawful protection of such person’s or another’s person or property, as permitted in sections 18-12-105 (2)(b) and 18-12-105.5 (3)(c), may tend to travel within a county, city and county, or municipal jurisdiction or in or through different county, city and county, and municipal jurisdictions, en route to the person’s destination;
(b) Inconsistent laws exist in local jurisdictions with regard to the circumstances under which weapons may be carried in automobiles and other private means of conveyance;
(c) This inconsistency creates a confusing patchwork of laws that unfairly subjects a person who lawfully travels with a weapon to criminal penalties because he or she travels within a jurisdiction or into or through another jurisdiction;
(d) This inconsistency places citizens in the position of not knowing when they may be violating local laws while traveling within a jurisdiction or in, through, or between different jurisdictions, and therefore being unable to avoid committing a crime.
(2)
(a) Based on the findings specified in subsection (1) of this section, the general assembly concludes that the carrying of weapons in private automobiles or other private means of conveyance for hunting or for lawful protection of a person’s or another’s person or property while traveling into, through, or within, a municipal, county, or city and county jurisdiction, regardless of the number of times the person stops in a jurisdiction, is a matter of statewide concern and is not an offense.
(b) Notwithstanding any other provision of law, no municipality, county, or city and county shall have the authority to enact or enforce any ordinance or resolution that would restrict a person’s ability to travel with a weapon in a private automobile or other private means of conveyance for hunting or for lawful protection of a person’s or another’s person or property while traveling into, through, or within, a municipal, county, or city and county jurisdiction, regardless of the number of times the person stops in a jurisdiction.

(1) [This version of this section is effective until March 1, 2022.]A person commits a class 2 misdemeanor if:
(a) He knowingly and unlawfully aims a firearm at another person; or
(b) Recklessly or with criminal negligence he discharges a firearm or shoots a bow and arrow; or
(c) He knowingly sets a loaded gun, trap, or device designed to cause an explosion upon being tripped or approached, and leaves it unattended by a competent person immediately present; or
(d) The person has in his or her possession a firearm while the person is under the influence of intoxicating liquor or of a controlled substance, as defined in section 18-18-102 (5). Possession of a permit issued under section 18-12-105.1, as it existed prior to its repeal, or possession of a permit or a temporary emergency permit issued pursuant to part 2 of this article is no defense to a violation of this subsection (1).
(e) He knowingly aims, swings, or throws a throwing star or nunchaku as defined in this paragraph (e) at another person, or he knowingly possesses a throwing star or nunchaku in a public place except for the purpose of presenting an authorized public demonstration or exhibition or pursuant to instruction in conjunction with an organized school or class. When transporting throwing stars or nunchaku for a public demonstration or exhibition or for a school or class, they shall be transported in a closed, nonaccessible container. For purposes of this paragraph (e), “nunchaku” means an instrument consisting of two sticks, clubs, bars, or rods to be used as handles, connected by a rope, cord, wire, or chain, which is in the design of a weapon used in connection with the practice of a system of self-defense, and “throwing star” means a disk having sharp radiating points or any disk-shaped bladed object which is hand-held and thrown and which is in the design of a weapon used in connection with the practice of a system of self-defense. (1)[This version of this section is effective March 1, 2022.] A person commits a class 1 misdemeanor if:
(a) He knowingly and unlawfully aims a firearm at another person; or
(b) Recklessly or with criminal negligence he discharges a firearm or shoots a bow and arrow; or
(c) He knowingly sets a loaded gun, trap, or device designed to cause an explosion upon being tripped or approached, and leaves it unattended by a competent person immediately present; or
(d) The person has in his or her possession a firearm while the person is under the influence of intoxicating liquor or of a controlled substance, as defined in section 18-18-102 (5). Possession of a permit issued under section 18-12-105.1, as it existed prior to its repeal, or possession of a permit or a temporary emergency permit issued pursuant to part 2 of this article is no defense to a violation of this subsection (1).
(2)
(a) A person commits a class 2 misdemeanor if the person knowingly aims, swings, or throws a throwing star or nunchaku as defined in this subsection (2)(b) at another person, or the person knowingly possesses a throwing star or nunchaku in a public place except for the purpose of presenting an authorized public demonstration or exhibition or pursuant to instruction in conjunction with an organized school or class. When transporting throwing stars or nunchaku for a public demonstration or exhibition or for a school or class, they shall be transported in a closed, nonaccessible container.
(b) For purposes of this subsection (2), “nunchaku” means an instrument consisting of two sticks, clubs, bars, or rods to be used as handles, connected by a rope, cord, wire, or chain, which is in the design of a weapon used in connection with the practice of a system of self-defense, and “throwing star” means a disk having sharp radiating points or any disk-shaped bladed object which is hand-held and thrown and which is in the design of a weapon used in connection with the practice of a system of self-defense.

A person commits a class 5 felony if he knowingly and unlawfully uses a stun gun in the commission of a criminal offense.

Any person who has within five years previously been convicted of a violation under section 18-12-103, 18-12-105, or 18-12-106 shall, upon conviction for a second or subsequent offense under the same section, be guilty of a class 5 felony.

(1) Any person who knowingly or recklessly discharges a firearm into any dwelling or any other building or occupied structure, or into any motor vehicle occupied by any person, commits the offense of illegal discharge of a firearm.
(2) It shall not be an offense under this section if the person who discharges a firearm in violation of subsection (1) of this section is a peace officer as described in section 16-2.5-101, C.R.S., acting within the scope of such officer’s authority and in the performance of such officer’s duties.
(3) Illegal discharge of a firearm is a class 5 felony.

(1) [This version of this section is effective until March 1, 2022.]A person commits the crime of possession of a weapon by a previous offender if the person knowingly possesses, uses, or carries upon his or her person a firearm as described in section 18-1-901 (3)(h) or any other weapon that is subject to the provisions of this article subsequent to the person’s conviction for a felony, or subsequent to the person’s conviction for attempt or conspiracy to commit a felony, under Colorado or any other state’s law or under federal law.
(2)
(a) Except as otherwise provided by paragraphs (b) and (c) of this subsection (2), a person commits a class 6 felony if the person violates subsection (1) of this section.
(b) A person commits a class 5 felony, as provided by section 18-12-102, if the person violates subsection (1) of this section and the weapon is a dangerous weapon, as defined in section 18-12-102 (1).
(c) A person commits a class 5 felony if the person violates subsection (1) of this section and the person’s previous conviction was for burglary, arson, or any felony involving the use of force or the use of a deadly weapon and the violation of subsection (1) of this section occurs as follows:
(I) From the date of conviction to ten years after the date of conviction, if the person was not incarcerated; or
(II) From the date of conviction to ten years after the date of release from confinement, if such person was incarcerated or, if subject to supervision imposed as a result of conviction, ten years after the date of release from supervision.
(d) Any sentence imposed pursuant to this subsection (2) shall run consecutively with any prior sentences being served by the offender.
(3) A person commits the crime of possession of a weapon by a previous offender if the person knowingly possesses, uses, or carries upon his or her person a firearm as described in section 18-1-901 (3)(h) or any other weapon that is subject to the provisions of this article subsequent to the person’s adjudication for an act which, if committed by an adult, would constitute a felony, or subsequent to the person’s adjudication for attempt or conspiracy to commit a felony, under Colorado or any other state’s law or under federal law.
(4)
(a) Except as otherwise provided by paragraphs (b) and (c) of this subsection (4), a person commits a class 6 felony if the person violates subsection (3) of this section.
(b) A person commits a class 5 felony, as provided by section 18-12-102, if the person violates subsection (3) of this section and the weapon is a dangerous weapon, as defined in section 18-12-102 (1).
(c) A person commits a class 5 felony if the person commits the conduct described in subsection (3) of this section and the person’s previous adjudication was based on an act that, if committed by an adult, would constitute burglary, arson, or any felony involving the use of force or the use of a deadly weapon and the violation of subsection (3) of this section occurs as follows:
(I) From the date of adjudication to ten years after the date of adjudication, if the person was not committed to the department of institutions, or on or after July 1, 1994, to the department of human services; or
(II) From the date of adjudication to ten years after the date of release from commitment, if such person was committed to the department of institutions, or on or after July 1, 1994, to the department of human services or, if subject to supervision imposed as a result of an adjudication, ten years after the date of release from supervision.
(d) Any sentence imposed pursuant to this subsection (4) shall run consecutively with any prior sentences being served by the offender.
(5) A second or subsequent offense under paragraphs (b) and (c) of subsection (2) and paragraphs (b) and (c) of subsection (4) of this section is a class 4 felony.
(6)
(a) Upon the discharge of any inmate from the custody of the department of corrections, the department shall provide a written advisement to such inmate of the prohibited acts and penalties specified in this section. The written advisement, at a minimum, shall include the written statement specified in paragraph (c) of this subsection (6).
(b) Any written stipulation for deferred judgment and sentence entered into by a defendant pursuant to section 18-1.3-102 shall contain a written advisement of the prohibited acts and penalties specified in this section. The written advisement, at a minimum, shall include the written statement specified in paragraph (c) of this subsection (6).
(c) The written statement shall provide that:
(I)
(A) A person commits the crime of possession of a weapon by a previous offender in violation of this section if the person knowingly possesses, uses, or carries upon his or her person a firearm as described in section 18-1-901 (3)(h), or any other weapon that is subject to the provisions of this title subsequent to the person’s conviction for a felony, or subsequent to the person’s conviction for attempt or conspiracy to commit a felony, or subsequent to the person’s conviction for a misdemeanor crime of domestic violence as defined in 18 U.S.C. sec. 921 (a)(33)(A), or subsequent to the person’s conviction for attempt or conspiracy to commit such misdemeanor crime of domestic violence; and
(B) For the purposes of this paragraph (c), “felony” means any felony under Colorado law, federal law, or the laws of any other state; and
(II) A violation of this section may result in a sentence of imprisonment or fine, or both.
(d) The act of providing the written advisement described in this subsection (6) or the failure to provide such advisement may not be used as a defense to any crime charged and may not provide any basis for collateral attack on, or for appellate relief concerning, any conviction. (1)[This version of this section is effective March 1, 2022.]A person commits the crime of possession of a weapon by a previous offender if the person knowingly possesses, uses, or carries upon his or her person a firearm as defined in section 18-1-901 (3)(h) or any other weapon that is subject to the provisions of this article 12 subsequent to the person’s conviction for a felony crime as defined in section 24-4.1-302 (1), or subsequent to the person’s conviction for attempt or conspiracy to commit a crime as defined in section 24-4.1-302 (1) that is a felony, under Colorado or any other state’s law or under federal law.
(2) A person commits a class 5 felony if the person violates subsection (1) or (3) of this section. A person who violates subsection (1) or (3) of this section and used or threatened the use of the firearm in the commission of another crime is not eligible for probation or any other alternative sentence and shall be sentenced to the department of corrections.
(3) A person commits the crime of possession of a weapon by a previous offender if the person knowingly possesses, uses, or carries upon his or her person a firearm as defined in section 18-1-901 (3)(h) or any other weapon that is subject to the provisions of this article 12 subsequent to the person’s adjudication for an act which, if committed by an adult, would constitute a felony crime as defined in section 24-4.1-302 (1), or subsequent to the person’s adjudication for attempt or conspiracy to commit a crime as defined in section 24-4.1-302 (1) that is a felony, under Colorado or any other state’s law or under federal law in the previous ten years.
(4) and (5)(Deleted by amendment, L. 2021.)
(6)
(a) Upon the discharge of any inmate from the custody of the department of corrections, the department shall provide a written advisement to such inmate of the prohibited acts and penalties specified in this section. The written advisement, at a minimum, shall include the written statement specified in subsection (6)(c) of this section.
(b) Any written stipulation for deferred judgment and sentence entered into by a defendant pursuant to section 18-1.3-102 shall contain a written advisement of the prohibited acts and penalties specified in this section. The written advisement, at a minimum, shall include the written statement specified in subsection (6)(c) of this section.
(c) The written statement shall provide that:
(I)
(A) A person commits the crime of possession of a weapon by a previous offender in violation of this section if the person knowingly possesses, uses, or carries upon his or her person a firearm as described in section 18-1-901 (3)(h), or any other weapon that is subject to the provisions of this title subsequent to the person’s conviction for a felony, or subsequent to the person’s conviction for attempt or conspiracy to commit a felony, or subsequent to the person’s conviction for a misdemeanor crime of domestic violence as defined in 18 U.S.C. sec. 921 (a)(33)(A), or subsequent to the person’s conviction for attempt or conspiracy to commit such misdemeanor crime of domestic violence; and
(B) As used in this subsection (6)(c), “felony” means any felony under Colorado law, federal law, or the laws of any other state; and
(II) A violation of this section may result in a sentence of imprisonment or fine, or both.
(d) The act of providing the written advisement described in this subsection (6) or the failure to provide such advisement may not be used as a defense to any crime charged and may not provide any basis for collateral attack on, or for appellate relief concerning, any conviction.

(1)
(a) Except as provided in this section, it is unlawful for any person who has not attained the age of eighteen years knowingly to have any handgun in such person’s possession.
(b) Any person possessing any handgun in violation of paragraph (a) of this subsection (1) commits the offense of illegal possession of a handgun by a juvenile.
(c)
(I) Illegal possession of a handgun by a juvenile is a class 2 misdemeanor.
(II) For any second or subsequent offense, illegal possession of a handgun by a juvenile is a class 5 felony.
(d) A person under the age of eighteen years who is taken into custody by a law enforcement officer for an offense pursuant to this section must be taken into temporary custody in the manner described in section 19-2.5-305.
(2) This section shall not apply to:
(a) Any person under the age of eighteen years who is:
(I) In attendance at a hunter’s safety course or a firearms safety course; or
(II) Engaging in practice in the use of a firearm or target shooting at an established range authorized by the governing body of the jurisdiction in which such range is located or any other area where the discharge of a firearm is not prohibited; or
(III) Engaging in an organized competition involving the use of a firearm or participating in or practicing for a performance by an organized group under 501 (c)(3) as determined by the federal internal revenue service which uses firearms as a part of such performance; or
(IV) Hunting or trapping pursuant to a valid license issued to such person pursuant to article 4 of title 33, C.R.S.; or
(V) Traveling with any handgun in such person’s possession being unloaded to or from any activity described in subparagraph (I), (II), (III), or (IV) of this paragraph (a);
(b) Any person under the age of eighteen years who is on real property under the control of such person’s parent, legal guardian, or grandparent and who has the permission of such person’s parent or legal guardian to possess a handgun;
(c) Any person under the age of eighteen years who is at such person’s residence and who, with the permission of such person’s parent or legal guardian, possesses a handgun for the purpose of exercising the rights contained in section 18-1-704 or section 18-1-704.5.
(3) For the purposes of subsection (2) of this section, a handgun is “loaded” if:
(a) There is a cartridge in the chamber of the handgun; or
(b) There is a cartridge in the cylinder of the handgun, if the handgun is a revolver; or
(c) The handgun, and the ammunition for such handgun, is carried on the person of a person under the age of eighteen years or is in such close proximity to such person that such person could readily gain access to the handgun and the ammunition and load the handgun.
(4) Repealed.

(1)
(a) Any person who intentionally, knowingly, or recklessly provides a handgun with or without remuneration to any person under the age of eighteen years in violation of section 18-12-108.5 or any person who knows of such juvenile’s conduct which violates section 18-12-108.5 and fails to make reasonable efforts to prevent such violation commits the crime of unlawfully providing a handgun to a juvenile or permitting a juvenile to possess a handgun.
(b) Unlawfully providing a handgun to a juvenile or permitting a juvenile to possess a handgun in violation of this subsection (1) is a class 4 felony.
(2)
(a) Any person who intentionally, knowingly, or recklessly provides a handgun to a juvenile or permits a juvenile to possess a handgun, even though such person is aware of a substantial risk that such juvenile will use a handgun to commit a felony offense, or who, being aware of such substantial risk, fails to make reasonable efforts to prevent the commission of the offense, commits the crime of unlawfully providing or permitting a juvenile to possess a handgun. A person shall be deemed to have violated this paragraph (a) if such person provides a handgun to or permits the possession of a handgun by any juvenile who has been convicted of a crime of violence, as defined in section 18-1.3-406, or any juvenile who has been adjudicated a juvenile delinquent for an offense which would constitute a crime of violence, as defined in section 18-1.3-406, if such juvenile were an adult.
(b) Unlawfully providing a handgun to a juvenile or permitting a juvenile to possess a handgun in violation of this subsection (2) is a class 4 felony.
(3) With regard to firearms other than handguns, no person shall sell, rent, or transfer ownership or allow unsupervised possession of a firearm with or without remuneration to any juvenile without the consent of the juvenile’s parent or legal guardian. Unlawfully providing a firearm other than a handgun to a juvenile in violation of this subsection (3) is a class 1 misdemeanor.
(4) It shall not be an offense under this section if a person believes that a juvenile will physically harm the person if the person attempts to disarm the juvenile or prevent the juvenile from committing a violation of section 18-12-108.5.

(1) As used in this section:
(a)
(I) “Explosive or incendiary device” means:
(A) Dynamite and all other forms of high explosives, including, but not limited to, water gel, slurry, military C-4 (plastic explosives), blasting agents to include nitro-carbon-nitrate, and ammonium nitrate and fuel oil mixtures, cast primers and boosters, R.D.X., P.E.T.N., electric and nonelectric blasting caps, exploding cords commonly called detonating cord or det-cord or primacord, picric acid explosives, T.N.T. and T.N.T. mixtures, and nitroglycerin and nitroglycerin mixtures;
(B) Any explosive bomb, grenade, missile, or similar device; and
(C) Any incendiary bomb or grenade, fire bomb, or similar device, including any device, except kerosene lamps, which consists of or includes a breakable container including a flammable liquid or compound and a wick composed of any material which, when ignited, is capable of igniting such flammable liquid or compound and can be carried or thrown by one individual acting alone.
(II) “Explosive or incendiary device” shall not include rifle, pistol, or shotgun ammunition, or the components for handloading rifle, pistol, or shotgun ammunition.
(b)
(I) “Explosive or incendiary parts” means any substances or materials or combinations thereof which have been prepared or altered for use in the creation of an explosive or incendiary device. Such substances or materials may include, but shall not be limited to, any:
(A) Timing device, clock, or watch which has been altered in such a manner as to be used as the arming device in an explosive;
(B) Pipe, end caps, or metal tubing which has been prepared for a pipe bomb;
(C) Mechanical timers, mechanical triggers, chemical time delays, electronic time delays, or commercially made or improvised items which, when used singly or in combination, may be used in the construction of a timing delay mechanism, booby trap, or activating mechanism for any explosive or incendiary device.
(II) “Explosive or incendiary parts” shall not include rifle, pistol, or shotgun ammunition, or the components for handloading rifle, pistol, or shotgun ammunition, or any signaling device customarily used in operation of railroad equipment.
(2) Any person who knowingly possesses, controls, manufactures, gives, mails, sends, or causes to be sent an explosive or incendiary device commits a class 4 felony.
(2.5) Any person who knowingly possesses, controls, manufacturers, gives, mails, sends, or causes to be sent a chemical, biological, or radiological weapon commits a class 3 felony.
(3) Subsection (2) of this section shall not apply to the following persons:
(a) A peace officer while acting in his official capacity transporting or otherwise handling explosives or incendiary devices;
(b) A member of the armed forces of the United States or Colorado National Guard while acting in his official capacity;
(c) An authorized employee of the office of active and inactive mines in the division of reclamation, mining, and safety while acting within the scope of his or her employment;
(d) A person possessing a valid permit issued under the provisions of article 7 of title 9, C.R.S., or an employee of such permittee acting within the scope of his employment;
(e) A person who is exempt from the necessity of possessing a permit under the provisions of section 9-7-106 (5), C.R.S., or an employee of such exempt person acting within the scope of his employment;
(f) A person or entity authorized to use chemical, biological, or radiological materials in their lawful business operations while using the chemical, biological, or radiological materials in the course of legitimate business activities. Authorized users shall include clinical, environmental, veterinary, agricultural, public health, or radiological laboratories and entities otherwise licensed to possess radiological materials.
(4) Any person who knowingly uses or causes to be used or gives, mails, sends, or causes to be sent an explosive or incendiary device or a chemical, biological, or radiological weapon or materials in the commission of or in an attempt to commit a felony commits a class 2 felony.
(5) Any person who removes or causes to be removed or carries away any explosive or incendiary device from the premises where said explosive or incendiary device is kept by the lawful user, vendor, transporter, or manufacturer thereof, without the consent or direction of the lawful possessor, commits a class 4 felony. A person convicted of this offense shall be subjected to a mandatory minimum sentence of two years in the department of corrections.
(5.5) Any person who removes or causes to be removed or carries away any chemical, biological, or radiological weapon from the premises where said chemical, biological, or radiological weapon is kept by the lawful user, vendor, transporter, or manufacturer thereof, without the consent or direction of the lawful possessor, commits a class 3 felony. A person convicted of this offense shall be subject to a mandatory minimum sentence of four years in the department of corrections.
(6) Any person who possesses any explosive or incendiary parts commits a class 4 felony.
(6.5) Any person who possesses any chemical weapon, biological weapon, or radiological weapon parts commits a class 3 felony.
(7) Any person who manufactures or possesses or who gives, mails, sends, or causes to be sent any false, facsimile, or hoax explosive or incendiary device or chemical, biological, or radiological weapon to another person or places any such purported explosive or incendiary device or chemical, biological, or radiological weapon in or upon any real or personal property commits a class 5 felony.
(8) Any person possessing a valid permit issued under the provisions of article 7 of title 9, C.R.S., or an employee of such permittee acting within the scope of his employment, who knowingly dispenses, distributes, or sells explosive or incendiary devices to a person who is not authorized to possess or control such explosive or incendiary device commits a class 4 felony.

Upon the motion of the prosecuting attorney after the conviction of a defendant, the court may order the forfeiture of any firearms which were used by the defendant during the course of the criminal episode which gave rise to said conviction as an element of sentencing or as a condition of probation or of a deferred sentence. Firearms forfeited under this section shall be disposed of pursuant to section 16-13-311, C.R.S.

(1) Any person who knowingly purchases or otherwise obtains a firearm on behalf of or for transfer to a person who the transferor knows or reasonably should know is ineligible to possess a firearm pursuant to federal or state law commits a class 4 felony.
(2)
(a) Any person who is a licensed dealer, as defined in 18 U.S.C. sec. 921 (a)(11), shall post a sign displaying the provisions of subsection (1) of this section in a manner that is easily readable. The person shall post such sign in an area that is visible to the public at each location from which the person sells firearms to the general public.
(b) [This version of subsection (2)(b) is effective until March 1, 2022.] Any person who violates any provision of this subsection (2) commits a class 2 petty offense and, upon conviction thereof, shall be punished by a fine of two hundred fifty dollars.
(b) [This version of subsection (2)(b) is effective March 1, 2022.] Any person who violates any provision of this subsection (2) commits a civil infraction.

(1)
(a) On and after July 1, 2013, except as described in subsection (6) of this section, before any person who is not a licensed gun dealer, as defined in section 18-12-506 (6), transfers or attempts to transfer possession of a firearm to a transferee, he or she shall:
(I) Require that a background check, in accordance with section 24-33.5-424, C.R.S., be conducted of the prospective transferee; and
(II) Obtain approval of a transfer from the bureau after a background check has been requested by a licensed gun dealer, in accordance with section 24-33.5-424, C.R.S.
(b) As used in this section, unless the context requires otherwise, “transferee” means a person who desires to receive or acquire a firearm from a transferor. If a transferee is not a natural person, then each natural person who is authorized by the transferee to possess the firearm after the transfer shall undergo a background check, as described in paragraph (a) of this subsection (1), before taking possession of the firearm.
(2)
(a) A prospective firearm transferor who is not a licensed gun dealer shall arrange for a licensed gun dealer to obtain the background check required by this section.
(b) A licensed gun dealer who obtains a background check on a prospective transferee shall record the transfer, as provided in section 18-12-402, and retain the records, as provided in section 18-12-403, in the same manner as when conducting a sale, rental, or exchange at retail. The licensed gun dealer shall comply with all state and federal laws, including 18 U.S.C. sec. 922, as if he or she were transferring the firearm from his or her inventory to the prospective transferee.
(c) A licensed gun dealer who obtains a background check for a prospective firearm transferor pursuant to this section shall provide the firearm transferor and transferee a copy of the results of the background check, including the bureau’s approval or disapproval of the transfer.
(d) A licensed gun dealer may charge a fee for services rendered pursuant to this section, which fee shall not exceed ten dollars.
(3)
(a) A prospective firearm transferee under this section shall not accept possession of the firearm unless the prospective firearm transferor has obtained approval of the transfer from the bureau after a background check has been requested by a licensed gun dealer, as described in paragraph (b) of subsection (1) of this section.
(b) A prospective firearm transferee shall not knowingly provide false information to a prospective firearm transferor or to a licensed gun dealer for the purpose of acquiring a firearm.
(4) If the bureau approves a transfer of a firearm pursuant to this section, the approval shall be valid for thirty calendar days, during which time the transferor and transferee may complete the transfer.
(5) A person who transfers a firearm in violation of the provisions of this section may be jointly and severally liable for any civil damages proximately caused by the transferee’s subsequent use of the firearm.
(6) The provisions of this section do not apply to:
(a) A transfer of an antique firearm, as defined in 18 U.S.C. sec. 921(a)(16), as amended, or a curio or relic, as defined in 27 CFR 478.11, as amended;
(b) A transfer that is a bona fide gift or loan between immediate family members, which are limited to spouses, parents, children, siblings, grandparents, grandchildren, nieces, nephews, first cousins, aunts, and uncles;
(c) A transfer that occurs by operation of law or because of the death of a person for whom the prospective transferor is an executor or administrator of an estate or a trustee of a trust created in a will;
(d) A transfer that is temporary and occurs while in the home of the unlicensed transferee if:
(I) The unlicensed transferee is not prohibited from possessing firearms; and
(II) The unlicensed transferee reasonably believes that possession of the firearm is necessary to prevent imminent death or serious bodily injury to the unlicensed transferee;
(e) A temporary transfer of possession without transfer of ownership or a title to ownership, which transfer takes place:
(I) At a shooting range located in or on premises owned or occupied by a duly incorporated organization organized for conservation purposes or to foster proficiency in firearms;
(II) At a target firearm shooting competition under the auspices of, or approved by, a state agency or a nonprofit organization; or
(III) While hunting, fishing, target shooting, or trapping if:
(A) The hunting, fishing, target shooting, or trapping is legal in all places where the unlicensed transferee possesses the firearm; and
(B) The unlicensed transferee holds any license or permit that is required for such hunting, fishing, target shooting, or trapping;
(f) A transfer of a firearm that is made to facilitate the repair or maintenance of the firearm; except that this paragraph (f) does not apply unless all parties who possess the firearm as a result of the transfer may legally possess a firearm;
(g) Any temporary transfer that occurs while in the continuous presence of the owner of the firearm;
(h) A temporary transfer for not more than seventy-two hours. A person who transfers a firearm pursuant to this paragraph (h) may be jointly and severally liable for damages proximately caused by the transferee’s subsequent unlawful use of the firearm; or
(i) A transfer of a firearm from a person serving in the armed forces of the United States who will be deployed outside of the United States within the next thirty days to any immediate family member, which is limited to a spouse, parent, child, sibling, grandparent, grandchild, niece, nephew, first cousin, aunt, and uncle of the person.
(7) For purposes of paragraph (f) of subsection (6) of this section:
(a) An owner, manager, or employee of a business that repairs or maintains firearms may rely upon a transferor’s statement that he or she may legally possess a firearm unless the owner, manager, or employee has actual knowledge to the contrary and may return possession of the firearm to the transferor upon completion of the repairs or maintenance without a background check;
(b) Unless a transferor of a firearm has actual knowledge to the contrary, the transferor may rely upon the statement of an owner, manager, or employee of a business that repairs or maintains firearms that no owner, manager, or employee of the business is prohibited from possessing a firearm.
(8) Nothing in subsection (6) of this section shall be interpreted to limit or otherwise alter the applicability of section 18-12-111 concerning the unlawful purchase or transfer of firearms.
(9)
(a) [This version of subsection (9)(a) is effective until March 1, 2022.] A person who violates a provision of this section commits a class 1 misdemeanor and shall be punished in accordance with section 18-1.3-501. The person shall also be prohibited from possessing a firearm for two years, beginning on the date of his or her conviction.
(a) [This version of subsection (9)(a) is effective March 1, 2022.] A person who violates a provision of this section commits a class 2 misdemeanor and shall be punished in accordance with section 18-1.3-501. The person shall also be prohibited from possessing a firearm for two years, beginning on the date of his or her conviction.
(b) When a person is convicted of violating a provision of this section, the state court administrator shall report the conviction to the bureau and to the national instant criminal background check system created by the federal “Brady Handgun Violence Prevention Act”, Pub.L. 103-159, the relevant portion of which is codified at 18 U.S.C. sec. 922 (t). The report shall include information indicating that the person is prohibited from possessing a firearm for two years, beginning on the date of his or her conviction.

(1)
(a) It is unlawful for a licensed gun dealer to transfer a firearm to a transferee until the dealer has obtained approval for the firearms transfer from the bureau after the bureau has completed any background check required by state or federal law.
(b) Transferring a firearm in violation of this subsection (1) is a class 1 misdemeanor.
(2) This section does not apply to the sale of an antique firearm, as defined in 18 U.S.C. sec. 921 (a)(16), as amended, or a curio or relic, as defined in 27 CFR 478.11, as amended.
(3) As used in this section, unless the context otherwise requires:
(a) “Licensed gun dealer” has the same meaning set forth in section 18-12-506.
(b) “Transfer” has the same meaning set forth in section 24-33.5-424.

(1)
(a)
(I)  A person who owns a firearm and who has reasonable cause to believe that the firearm has been lost or stolen shall report such fact to a law enforcement agency not more than five days after discovering that the firearm has been lost or stolen. A report of a lost or stolen firearm must include, and the law enforcement agency receiving the report shall request, an accurate and detailed description of the firearm, including, to the extent known, the manufacturer, model, serial number, caliber, and any other identification number or distinguishing mark of the firearm being reported.
(II) A person other than the owner of a lost or stolen firearm who is a member of the owner’s family or who resides with the owner may report the loss or theft to a law enforcement agency. If a person who is not the owner of a lost or stolen firearm makes the report, the owner is not required to report pursuant to subsection (1)(a)(I) of this section. Making a report pursuant to this subsection (1)(a)(II) does not constitute acknowledgment of ownership of the firearm for the purposes of any other provision of law.
(b) A person who previously reported a lost or stolen firearm pursuant to this section who has found or otherwise recovered the firearm, or any other person who has found or recovered the firearm, shall report to the law enforcement agency that received the report that the firearm has been recovered.
(c) Except as provided in subsection (3) of this section, a person who knowingly violates subsection (1)(a)(I) of this section commits failure to report a lost or stolen firearm.
(2) Failure to report a lost or stolen firearm is a civil infraction, punishable by a twenty-five dollar fine; except that a second or subsequent offense is an unclassified misdemeanor and, upon conviction thereof, shall be punished by a fine of not more than five hundred dollars.
(3) This section does not apply to a licensed gun dealer, as defined in section 18-12-506.
(4) Within five days after receiving a report of a lost or stolen firearm pursuant to this section, the law enforcement agency that receives the report shall enter any available descriptive information related to the lost or stolen firearm into the Colorado bureau of investigation crime information center database.
(5) A person who reports a lost or stolen firearm pursuant to subsection (1) of this section is immune from criminal prosecution for an offense in this part 1 related to the storage of firearms.
(6) This section is known and may be cited as the “Isabella Joy Thallas Act”.

(1) Firearms must be responsibly and securely stored when they are not in use to prevent access by unsupervised juveniles and other unauthorized users. A person responsibly and securely stores a firearm when:
(a) The person carries the firearm on his or her person or within such close proximity thereto that the person can readily retrieve and use the firearm as if the person carried the firearm on his or her person;
(b) The firearm is kept in a locked gun safe or other secure container or in a manner that a reasonable person would believe to be secure and a juvenile or resident of the premises who is ineligible to possess a firearm does not have access to the key, combination, or other unlocking mechanism necessary to open the safe or container;
(c) The person properly installs a locking device on the firearm and a juvenile or resident of the premises who is ineligible to possess a firearm does not have access to the key, combination, or other unlocking mechanism necessary to remove the locking device; or
(d) The firearm is a personalized firearm and the safety characteristics of the firearm are activated.
(2)
(a) A person commits unlawful storage of a firearm when the person fails to responsibly and securely store a firearm, as described in subsection (1) of this section, upon any premises that the person owns or controls and the person knows or reasonably should know that:
(I) A juvenile can gain access to the firearm without the permission of the juvenile’s parent or guardian; or
(II) A resident of the premises is ineligible to possess a firearm pursuant to state or federal law.
(b) Unlawful storage of a firearm is a class 2 misdemeanor.
(c) It is an affirmative defense to the offense of unlawful storage of a firearm that a juvenile gained possession of, and used, the firearm for the purpose of exercising the rights contained in section 18-1-704 or 18-1-704.5 or in defense of livestock.
(3) This section does not apply to storing an antique firearm, as defined in 18 U.S.C. sec. 921 (a)(16), as amended, or a curio or relic, as defined in 27 CFR 478.11, as amended.