I filed the form to convert the SIG 516 lower to an SBR lower. In the meantime, I saw a good deal on a SIG 516 Pistol with a 7.5" barrel so I bought it. Once I received the tax stamp I switched the PDW upper to the SBR lower and then converted the pistol lower to a rifle for the 16" upper.
I'm toying with the idea of getting one of those SIG 1911s for my next Sig.





