Originally Posted By ryanwilson1979:
I believe that if you permanently attach the suppressor to the shortened barrel, as long as the total is 18", you should be good as far as length goes. You would not have to register the SBS........that would save you another stamp. However, to do it (I'm guessing legally) you would have to have the barrel shortened (bout a $100) and attached by threads, then tac welded. Then reassemble the barrel onto the gun w/suppressor. That way you won't have created a SBS.
To do that, I believe you have to press the barrel from the trunnion, have the suppressor attached, and reinstall the barrel in the trunnion (I could be wrong). IMHO, that would be worth the $200 as a SBS to take the suppressor off as desired to trouble shoot. I suppose you could possibly take a stripped AK lower, build a 12-gauge pistol, get it running, then F1 into SBS, but that seems like a LOT of work. SBS seems to be the cost and time effective route.
Also, while 3-6" of burning powder may or may not be an issue, I don't know that I'd want aluminum baffles. But that's personal preference.
ETA: YMMV, IANAL, etc.