I was talking to a guy today about 10.5 upper that he wants to put on to a lower but he said that it's a NFA weapon. I asked if he were to put it on to a "pistol" lower would it then just be pistol? He nor do I knew the answer. I'm leaning towards to yes if the lower was reported to MSP as a pistol lower not just a lower. I know MSP has made some changes in their thinking on lowers and NFA weapons. Thanks Chris