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I want to sbr my mp5

I just bought a very nice German mp5 parts kit along with a fully welded receiver. It transferred to me as a pistol and I want to do the paperwork to build an sbr out of it. Should I build it first as a pistol and then submit paperwork? And form 1 or form 4?

Thanks for the help guys
Form 1 is for if you are building it.
Form 4 is for if you are buying it.

Go ahead and file the form 1 and start building the pistol. Put a arm brace on it in the mean time while you're waiting for the form 1 to be approved.
Definitely pistol->SBR. I SBR'd mine a while back, and was using an <broken link removed> in the meantime. Pretty sure I have it sitting around if you want it for half price.


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