Two Colorado statutes concern firearms in vehicles:
Title 18: Colorado allows a person to carry a firearm in a vehicle if its use is for lawful protection of such person or another’s person or property. [C.R.S. § 18-12-105(2)] Colorado law also allows a person to possess a handgun in a dwelling, place of business, or automobile. However, when you carry the weapon into your home, business, hotel room, etc. it must be in plain view. Local jurisdictions may not enact laws that restrict a person’s ability to travel with a weapon. [C.R.S. § 18-12-105.6] The Act permits the nationwide carrying of concealed handguns by qualified current and retired law enforcement officers and amends the Gun Control Act of 1968 (Pub. L. 90-618, 82 Stat. 1213) to exempt qualified current and retired law enforcement officers from state and local laws prohibiting the carry of concealed firearms.
Title 33: In accordance with Colorado wildlife laws, including C.R.S. § 33-6-125, you may carry a weapon in your vehicle. However it is unlawful for any person, except a person authorized by law or by the division, to possess or have under his control any firearm, other than a pistol or revolver, in or on any motor vehicle unless the chamber of such firearm is unloaded. A “muzzle-loader” shall be considered unloaded if it is not primed, and, for such purpose, “primed” means having a percussion cap on the nipple or flint in the striker and powder in the flash pan.