I think this has gotten off to the idea that someone is going to illegally create a machine gun. This is not the case at all. The person that is suggesting the conversion to the M1A owner is a licensed C3 guy who runs a legitimate business. Based on what I was told, the end result was unclear to me, but, there's lots of things about the NFA world I am ignorant of, to be sure. My main question was, what would category would the rifle be in AFTER any such modification for a so-called registered auto-sear. I feel sure that we all know such items (auto-sears) are NFA controlled and one better have all the paperwork to possess one. But, could the rifle (by itself) still be sold as any other semi-auto rifle or would it require some NFA papers to be sold? Or, would it require papers to even modify before hand such as SBR conversion? Personally, I refuse to enter into the NFA world because of all the sticky wickets such as this, as a "little" knowledge is dangerous. Besides, my pockets aren't that deep! ha