I'm building my own suppressor and I'm in the process of it, I'm curious as to what needs to be engraved on to the tube to make it legal, and anyone know any companies that do the engraving?
Thank you

Full name (or name of the trust) that is on your F1.  City and state that you listed on the F1.  Serial number that you put on the F1.

Needs to be at least .003” deep and 1/8” tall letters.


I used a $189 desktop engraver to mark my SBR and suppressor….came out pretty good .  I’m waiting for 3 more F1 stamps, and by not having to pay for several engravings, it’s paid for itself.

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Serial only needs to be 1/16" letters and there's no height requirement for the other info.


MARKING REQUIREMENTS – NFA FIREARMS (27 CFR § 479.102)

(a) You, as a manufacturer, importer, or maker of a firearm, must legibly identify the firearm as
follows:
(1) By engraving, casting, stamping (impressing), or otherwise conspicuously
placing or causing to be engraved, cast, stamped (impressed) or placed on the
frame or receiver thereof an individual serial number. The serial number must be
placed in a manner not susceptible of being readily obliterated, altered, or removed,
and must not duplicate any serial number placed by you on any other firearm. For
firearms manufactured, imported, or made on and after January 30, 2002, the
engraving, casting, or stamping (impressing) of the serial number must be to a
minimum depth of .003 inch and in a print size no smaller than 1/16 inch; and
(2) By engraving, casting, stamping (impressing), or otherwise conspicuously
placing or causing to be engraved, cast, stamped (impressed), or placed on the
frame, receiver, or barrel thereof certain additional information. This information
must be placed in a manner not susceptible of being readily obliterated, altered or
removed. For firearms manufactured, imported, or made on and after January 30,
2002, the engraving, casting, or stamping (impressing) of this information must be
to a minimum depth of .003 inch. The additional information includes:
Firearms Verification - Gun Control Act Definitions 7
(i) The model, if such designation has been made;
(ii) The caliber or gauge;
(iii) Your name (or recognized abbreviation) and also, when applicable,
the same of the foreign manufacturer or maker;
(iv) In the case of a domestically made firearm, the city and State (or
recognized abbreviation thereof) where you as the manufacturer
maintain your place of business, or where you, as the maker, made the
firearm; and
(v) In the case of an imported firearm, the name of the country in which
it was manufactured and the city and State (or recognized abbreviation
thereof) where you as the importer maintain your place of business. For
additional requirements relating to imported firearms, see Customs
regulations at 19 CFR part 134.

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