You get permission from BATFE to make an SBR. Once you get that (Form 1) you can make the gun; it was already registered when the Form 1 was approved. Note that you, and only you, can make the SBR. If you use a gunsmith, you don't need the Form 1, but the gunsmith must be licensed as an NFA manufacturer and you must take/send the gun to him; he will alter it and return it on a Form 4 after BATFE approval of the transfer.
Jim:
since we're talking about an AR here, the creator needn't be a C2, you think?
the barrel is simply an upper. the creator just needs to ensure that the short
barreled upper has a matching lower which has already been SBRed...one-for-
one. in other words, no SBR with two short bbl uppers. this, or no AR lower
at all in their possession. am i off base here?
