buying a SBR upper w/o the paperwork....yet...
Question:
Would it be possible/legal to purchase a short barreled upper and NOT install it onto a rifle lower, before sending in the legal paperwork for an SBR? In theory at least, I'm thinking that it's not an "SBR" until I slap it onto a lower receiver with a stock, right?
I have no intent of doing anything illegal, but with things like uppers being in short supply right now, I was just wondering that if I got an e-mail notice from Bravo Company that their 11.5" uppers came in stock, could I purchase now, fill out the paperwork, and wait to install until it got approved? It wouldn't be any different than buying it for a pistol lower, without having the pistol lower yet, right?
How does the legal timing work on NFA items? Thanks.