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.
C.R.S. § 18-12-103
Possession of a defaced firearm
Known as the Isabella Joy Thallas Act
The act spans §§ 18–18 (55 sections).
Digitized from: Public.Law — Colorado Revised Statutes. Reproduced from public-domain Colorado statutes; confirm against the official source for the current text. Not legal advice.