Its sad that all those original non-M2 parts will get destroyed along with the receiver/9 kit. Hyperthetical question (because the entire thing is a stolen weapon), what parts have to be surrendered to ATF? In theory, could the old man have sold the non-M2 parts and turned just the M2 parts over to ATF? I am NOT advocating any illegal acts, just curious as to what the legal requirements actually are for future instances....