BATFE requires that it be affixed in such a way that removal cannot be accomplished with common tools. Blind pin is the best way.I'm getting a coharie mp5 pistol and want to add a stock to it but I need the SBR paperwork done. I want to know if i can add a fake can, pin it on and add a compound like JB Weld so the can is not easily removed. I want to be able to convert it from pistol to rifle with out having to go find someone to re-weld or remove the weld when i want to jump back and forward from pistol with no stock and can to rifle with stock and fake can until i do receive my paperwork back. Once i get it registered as a SBR plus have the new suppressor registered i won't have to worry about doing this any more.
Would this be legal in most states? I'm from Louisiana and from what i heard from others you have to have a 16 inch barrel or an extension that's pinned and welded. But does it have to be really welded as i heard?
Also, be aware that once you SBR a pistol, it is now legally a RIFLE. Once you do so, if you revert it to the pistol configuration, you now have a "Pistol made from a rifle", AKA a big no-no. If you want a pistol, leave it as is. if you want an SBR, do that.
Personally, I would wait for the tax stamp, then aquire the stock (to avoid the constructive intent issue), rather than gunsmithing your pistol to a 16" barreled rifle, then gunsmithing it back once you get your stamp.