Re: NFA trust
Remember this ask 10 of them at the BATF&E and you'll get 10 different answers. Ambiguity is a government standard, it needs to be written. See below, it is directly from the U.S.C.
<span style="font-style: italic">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:
(i) The model, if such designation has been made;
(ii) The caliber or gauge;
(iii) Your name (<span style="color: #FF0000">or recognized abbreviation</span>) and also, when
applicable, the name of the foreign manufacturer or maker;
(iv) In the case of a domestically made firearm, the city and State
(<span style="color: #FF0000">or recognized abbreviation thereof</span>) 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 (<span style="color: #FF0000">or recognized abbreviation thereof</span>) 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.
(b) The depth of all markings required by this section will be
measured from the flat surface of the metal and not the peaks or ridges. The height of serial numbers required by paragraph (a)(1) of this section will be measured as the distance between the latitudinal ends of the character impression bottoms (bases).</span>
I personally have an attorney for these types of questions, and firearms manufacturing is his niche. That being said, due your own due dilligence, the internet is like assholes, averyone has one.