When manufacturing a class 3 firearm that is restricted by the NFA it is important to follow the guidelines found in the ATF Publication 5300.4 - section 479.102 " How must firearms be identified?"
Generally, any gun manufactured, imported, or made on and after January, 2002 must have the manufacturers information engraved, cast, stamped by impression, at a minimum depth of .003" with a height no smaller than 1/16" on the frame, receiver, or barrel.
The required information on an SBR is the model (if such one exists), caliber or gauge, and the manufacturer's name (or recognized abbreviation). Also for a domestically made (SBR) the city and state (or recognized abbreviation), where you as the manufacturer made the firearm.
Generally, any gun manufactured, imported, or made on and after January, 2002 must have the manufacturers information engraved, cast, stamped by impression, at a minimum depth of .003" with a height no smaller than 1/16" on the frame, receiver, or barrel.
The required information on an SBR is the model (if such one exists), caliber or gauge, and the manufacturer's name (or recognized abbreviation). Also for a domestically made (SBR) the city and state (or recognized abbreviation), where you as the manufacturer made the firearm.
