2018 Colorado Revised Statutes
Title 18 - Criminal Code
Article 12 - Offenses Relating to Firearms and Weapons
Part 1 - Firearms and Weapons - General
§ 18-12-103. Possession of a defaced firearm
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.