Can type flash suppressors and the BATF
There's lots of single chamber flash suppression devices out there right now, and all of them seem to be tested by the BATF to certify they're not sound suppressors.
Since I'm a machinist, I want to make my own flash suppressor, but what do I need to do to get the BATF to verify it's not a silencer?
Another issue here, is that my barrel was supplied a little shorter than I ordered (it's a 14.5, not 16), so I have to pin the damn thing on before it's legal. This isn't a problem in the grand scheme - but since I'm going to be prototyping, there's gonna be a couple revisions before I get there.
So how would one approach the feds on this? I don't really want to be put on the map as a weapons component manufacturer just yet. I also don't want to end up in federal pound me in the azz prison for NFA violations.