C.R.S. § 18-12-103.5

(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.