Farmerbyron http://identmarking.com/ did mine took several weeks but turned out really good.
Does laser engraving meet NFA requirements?
Not all lasers will meet the .003" depth requirement for NFA markings. I believe it needs to be done with a YAG laser, the typical Co2 (low power, < 500 watts +) laser will reflect the laser energy and remove only the anodizing. I would check with the guy you plan on using to make sure his laser will do that depth.
Makers markings only have the .003" depth requirement (see part in blue below). They do not have a size requirement, only that they are "conspicuously placed". Only the serial number has a 1/16" height requirement and .003" depth requirement (see part in red below) and I assume you are using the existing lower's serial number, so that is a non-issue.
Title 27: Alcohol, Tobacco and Firearms
§ 479.102 How must firearms be identified?
(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:
(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 name 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.
(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).
(c) The Director may authorize other means of identification upon receipt of a letter application from you, submitted in duplicate, showing that such other identification is reasonable and will not hinder the effective administration of this part.
(d) In the case of a destructive device, the Director may authorize other means of identifying that weapon upon receipt of a letter application from you, submitted in duplicate, showing that engraving, casting, or stamping (impressing) such a weapon would be dangerous or impracticable.
(e) A firearm frame or receiver that is not a component part of a complete weapon at the time it is sold, shipped, or otherwise disposed of by you must be identified as required by this section.
(f)(1) Any part defined as a machine gun, muffler, or silencer for the purposes of this part that is not a component part of a complete firearm at the time it is sold, shipped, or otherwise disposed of by you must be identified as required by this section.
(2) The Director may authorize other means of identification of parts defined as machine guns other than frames or receivers and parts defined as mufflers or silencers upon receipt of a letter application from you, submitted in duplicate, showing that such other identification is reasonable and will not hinder the effective administration of this part.
Thanks for the info. Where I got the letter size was from Ident Marking Services email:
We can use this image if we can get the text big enough where you want. For the engraving to be ATF compliant it has to be a least .062 tall. Another thing is you are going to loose some detail because of the colors and shading. When we deep engrave we are basically down to 1 color. Unless you can find us a vector file we will have to create it, so the for the engraving and artwork is going to run $140 shipped. I will check to see if the text will be tall enough.
This is the image I am wanting to use but with no color, just shading. wanting all my info in ribbons on cross, they want it in a vector file:
There work looks really nice.
We can use this image if we can get the text big enough where you want. For the engraving to be ATF compliant it has to be a least .062 tall. Another thing is you are going to loose some detail because of the colors and shading. When we deep engrave we are basically down to 1 color. Unless you can find us a vector file we will have to create it, so the for the engraving and artwork is going to run $140 shipped. I will check to see if the text will be tall enough.
This is the image I am wanting to use but with no color, just shading. wanting all my info in ribbons on cross, they want it in a vector file:
There work looks really nice.
Print it to PDF. That's a vector file. 
They are just using the serial # height requirement and thinking it applies to the makers markings as well (1/16" = .062"). No big deal if that is the way they interpret the regulation, it is a common misconception. I think it would look the best if they would try to match the height and font of the markings that the original title 1 manufacturer used on the receiver. Makes it look more "factory" in my opinion.
That is a very cool image you want on there. I like it.
Print it to PDF. That's a vector file.
Nice to see you back Dustin. You have been missed.
Too cold to ride my bike!
That looks pretty awesome. Where are you a firefighter at? Feel free to PM me if you don't want to announce it to the world.
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