Firearm Serialization and Marking
May a manufacturer remove and change a serial number if they duplicated a serial number on a firearm?
It is unlawful for a person to obliterate or remove a serial number from a firearm.
(Ref: 478.34)
What markings are required to be engraved on firearms?
A domestically manufactured firearm must be engraved with the following 5 markings by the manufacturer: Serial Number, Manufacturer’s Name, Manufacturer’s City and State, Model (if known), and Caliber / Gauge (if known). A firearm frame or receiver that is not fully assembled into a functional firearm must, at a minimum, be engraved with the Serial Number, Manufacturer’s Name, and Manufacturer’s City and State before it is shipped in interstate commerce.
An imported firearm must be engraved with the following 7 markings: Serial Number, Manufacturer’s Name, Country of Manufacture, Importer’s Name, Importer’s City and State, Model, and Caliber / Gauge.
An FFL who converts a GCA-regulated firearm into an NFA item must engrave their Manufacturer’s Name and Manufacturer’s City and State onto the firearm (the remaining markings may be adopted).
(Ref: 478.92 / 479.102)
Where on the firearm are the required markings to be placed?
The serial number must be placed on the firearm’s frame or receiver. The remaining markings may be placed on the receiver, barrel, or slide.
(Ref: 478.92 / 479.102)
What are the size and depth markings for firearms?
Firearm markings must be engraved to .003 inches deep (after all finishing operations have been performed). The serial number must be 1/16 inches tall. All markings are required to be “conspicuous” in that they are visible while the firearm is assembled and in operable condition.
(Ref: 478.92 / 479.102)