Originally Posted By grooVe:
What are the legal differences between an ar15 type pistol and a SBR?
Could I build a SBR M4 on a pistol lower and be legal?
I really like the look of the 14.5 barrel on a true M4, but don't want to have to do the NFA thing just for barrel length.
An AR Pistol can be built from a lower that has never had a buttstock installed. Depending on your State regs, you may have to fufill the requirements of a a pistol puchase (registration, waiting period, etc), despite this, the ATF claims that the 4473 should be logged as a "stripped lower", nothing more, nothing less, if you intend to build a pistol.
There is no Federal requirement that the receiver be logged out of the manufacturer as a pistol, be marked as a pistol, or that you fill out the 4473 as a pistol.
You may then build that "pistol" lower with a non-buttstock buffer system, and the upper of your choice (7, 10, 11, 14, - hell, you can put a 24" Varminter if you want). You then have yourself a legitimate pistol.
ETA: Just don't put a forward pistol grip on the HG. The BATFE considers that
configuration an "Any Other Weapon", and would require it's own Form 1.You may add a buttstock to that lower without the SBR tax stamp, if, and only if, your upper has an overall barrel legth of 16" or longer
(again, state law may apply here, and you could be SOL).
The SBR requires an NFA Tax stamp; You will need to fill out a Form 1 in duplicate, have your fingerprints done in duplicate, have the CLEO in your area approve of your intended purchase, send it all to the BATFE, and wait several months for them to sign off on it.
You may then put the pertinent info on the lower you requested for the SBR, and add an upper that is less than 16". This can be done with either a "rifle" or "pistol" receiver, but it must be the one that you listed on your Form 1.
If you want the 14.5" length barrel WITH a buttstock, you have two choices:
Fill out the Form1, and get the NFA tax stamp.
Purchase an M4 style upper, and have a 1.75" flash hider (extended A2 or Phantom) pinned and welded to the barrel.
I hope that answers you question fully.
Edited to correct the spelling of receiver, and to add the AOW stuff