What is required by the ATF for SBR engraving under NFA?

August 19, 2008
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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.