Is it legal to have someone make the baffles if I'm going to do the paperwork get the stamp and build a suppressor?
http://www.atf.gov/publications/download/p/atf-p-5320-8/atf-p-5320-8-chapter-7.pdfPersons other than qualified manufacturers may repair silencers, but replacement parts are “silencers” as defined in 18 U.S.C. § 921(a)(24) that must be registered and transferred in accordance with the NFA and GCA.
http://www.atf.gov/publications/download/p/atf-p-5320-8/atf-p-5320-8-chapter-2.pdf - page 16:7.4.6 Marking silencer parts. Some FFLs/SOTs assemble silencers, for subsequent sale, from parts
acquired from their contractors (NOTE: this activity is the “manufacture” of NFA firearms requiring the
assembler and the contractor to qualify as manufacturers under the GCA and the NFA). Under these
circumstances, ATF takes the position that contractors are not required to place identifying markings on
silencer parts. They may, however, place an assembler’s markings on these parts if the assembler so
desires. It should also be noted that these contractors are not required to register the parts they produce
by filing Forms 2, nor are they required to obtain approved Forms 3 to transfer the parts to assemblers.
Also included within the silencer definition is any part intended only for use in the assembly or fabrication of a firearm silencer.
Any of the above illustrated components meet the definition of a firearm silencer and are subject to the NFA. NOTE: the language in the definition of silencer contains no provisions that permit an owner of a registered silencer to possess spare or replacement components for the silencer. However, licensed manufacturers who are SOTs may possess spare silencer components in conjunction with their manufacturing operations.
I would think that as long as they weren't contracted to actually build the supressor, it's probably OK. Without a housing, the baffles are nothing more than oddly shaped funnels. I mean, you could do one of those online CAD programs and have most any small parts built and delivered without ever setting foot in a machine shop or actually talking to anyone.
For the purposes of the National Firearms Act the term Silencer is defined in 18 U.S.C. § 921(a)(24)
The term “Firearm Silencer” or “Firearm Muffler” means any device for silencing, muffling, or diminishing the report of a portable firearm, including any combination of parts, designed or redesigned, and intended for the use in assembling or fabricating a firearm silencer or firearm muffler, any part intended only for use in such assembly or fabrication.
(6) The term "short-barreled shotgun" means a shotgun having one or more barrels less than eighteen inches in length and any weapon made from a shotgun (whether by alteration, modification,or otherwise) if such weapon as modified has an overall length of less than twenty-six inches.