You do have to declare the overall length, barrel length and caliber on your form 1.TexasVet wrote:Not being up to date on NFA things. When submitting a form one, do you have to specify the exact length, caliber, etc ? or just that you want to build an SBR ? So can you have all the pieces (even having a pistol upper) and just wait for the lower to get a stamp for the SBR ? Is the lower the only part registered and could you swap uppers ?
Thanks
If you wish to gather and assemble all the parts and pieces beforehand, I would strongly suggest you invest in a pistol buffer kit, otherwise you have 'constructive intent' hanging over you until you get the stamp back.