Just wait until the PO loses the approved form and stamp for a machine gun. Been there - done that!
Yeah, I've thought about that too. I ended up having to chase down the mailwoman yesterday. Sat at my shop until 5pm for a rifle. Mailwoman just drives up to the mailbox, throws a card in, drives off. So I followed her into the next turn and asked where my package was. "Oh, I didn't think you'd be there this late on a Saturday, so I left it at the office before setting out on my run" Ended up getting it yesterday, after I sat in the office parking lot for another 30 minutes.
Swift I tell ya, swift!