Unless your local ffl is not an sot they also cant hold it for you if they have rifle recievers and no pistol lower to put it on... same rules apply.
Friend of mine bought a pistol lower for his shorty 300blk while he is doing the paperwork for an sbr.
You only need a sot ffl (class3 in common terms) if your transfering an nfa item across state lines. You can do a person to person transfer sans ffl by filling out submitting forms waiting for stamps. Once the stamp shows up its a private sale like any other private sale.
Now, in your case the upper itself falls under constructive intent. It doesnt matter where you store it. If you have access to it on your own and it isnt logged into an ffl bound book you have access to it. That means if you store it in antarctica under a igloo its still constructive intent.
Couple things you can do with an item that cannot go into a bound book, either buy a pistol lower to remove constructive intent or dont buy the upper. The pistol lower does not have to be fully assembled. Or best case find a sot dealer in your area willing to help you with storage while your sbring it.
Keep copies of the papers you submit to the batfe along with the registered mail reciepts. Just in case
Its a bad idea to buy nfa parts without having the nfa item ready to go.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent
Last edited by JonM; 07-09-2013 at 08:33 PM.