C.R.S. 18-12-102
18-12-102. Possessing a dangerous or illegal weapon - affirmative defense - definition

(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.

C.R.S. 18-12-105

18-12-105. Unlawfully carrying a concealed weapon - unlawful possession of weapons


(1) A person commits a class 2 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.