Would it be possible to perminetly attach a suppressor to a short rifle barrel so that the total length is greater than 16" effectivly giving you a suppressed SBR with only one tax stamp?
Sounds reasonable. The only snag I could see would be having a short barrel for the time before you attach your silencer.
Maybe do the barrel build at a buddies place where there's no mistaking that the barrel wont get up on it's own and jump on a receiver?
However, if you have a SBR and you want a suppressor you have to pay $400 in tax stamps, ($200 for the SBR, and $200 for the suppressor).
If you permanently attach the suppressor so that the "barrel" isn't "short", you only pay the $200 for the suppressor because the combined barrel length is over 16" and it doesn't count as an SBR.
I didn't think about the cleaning thing but if the can itself is what is welded on and the baffles come out from the front it would be ok. You only stand to save $200 on the sbr stamp but part of the appeal would be beating the system i guess and you would kind of get 2 for 1.
Thats what I did on this one to save $200. It's 16.125 to the end of the tube + the end cap. Just don't forget the barrel nut before you start welding.
Look up "Integral suppressor". You can have a 16" suppressed barrel without having to shorten it and weld a can on it. They are pretty common on 10/22s and .22 handguns. I think there are a few centerfire makers too.
A few thoughts of my own. I never thought of obtaining ATF authorization to make or buy an NFA weapon as "hard". I have heard many complaints about the process; takes too long, tax too high, sheriff won't sign. But all of these problems are easily surmountable. The one complaint I have hardly ever heard was "The ATF denied approval". So far I have only heard of one person saying he was rejected for a reason other than filling out the forms improperly, and that was for the reason for buying the weapon in block 4 of the ATF form. The ATF examiner wanted something other than "all legal purposes".
You can make the silencer permanently sealed if you only use jacketed center fire ammo in it. It has been my experience so far that only rim fire and those cans using cast ammo need to be taken apart to be cleaned. But opinions vary. I can cut apart a welded can also, but would rather not ever do it again.
I live in WA which bans SBR's, so the permanent mount to the barrel to give me >16" (>18" for shotgun) is the only way for me to enjoy a compact suppressed SBR. I plan on doing it someday for a 45 acp Enfield (delisle carbine).
It's just a 9mm AR. The tube and blast baffle are 4130 and the K’s are 7075.
I did machine a sort of perforated washer a few inches ahead of the welded on end cap to help keep everything in alignment and act as an expansion chamber. You can see the plug welds if you look close. The last photo is so you can understand the idea but is a thread on can for my M10.
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