According to federal law the trust name and location have to be engraved with letters no less than 1/16 inch tall. Most people live in cities with more than four letters in their city's name and it won't fit in that location. I guess you could say, that's a benefit to being in Hell.
I think the only thing that is required to use 1/16" tall font, is the SN.
You can look here
https://www.atf.gov/file/4881/download for what markings may be adopted in the making of a SBR
You can look here
https://www.atf.gov/firearms/firearms-guides-importation-verification-firearms-ammunition-firearms-verification-overview for the required markings specifics.
Note, it states...
Q: How must licensed manufacturers and licensed importers identify firearms, armor piercing ammunition?
Firearms. You, as a licensed manufacturer or licensed importer of firearms, must legibly identify each firearm manufactured or imported as follows:
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 or imported 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
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 or imported 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:
The model, if such designation has been made;
The caliber or gauge:
Your name (or recognized abbreviation) and also, when applicable, the name of the foreign manufacturer;
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; and
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.
I've used Veritas several times (great people to deal with), and the font size on my trust info is smaller than 1/6"
Take care,
Bob S.