Firearms made before the 1968 GCA without a serial number are not required to have a new serial number unless the are remanufactured (ie: rebarreled).

www.atf.gov/rules-and-regulations/q...ntrol-act-1968-required-be-marked-serial

Personally made firearms without a serial number are required to be serial numbered if entered into an FFL bound book.

www.atf.gov/rules-and-regulations/definition-frame-or-receiver

Last edited by DSchrank; 11/04/25 09:28 PM. Reason: Fixed links