I have seen it on TV and heard about people purchasing a cut up parts kit and welding/machining + a whole lot of work to put back together an MG-42 or a 1919 or some other "large full auto weapon" how does the BATFE look at these and where do they fall in the paperwork world? I am debating this as I have the skills and tools to do it. Just don't have the parts yet and don't want to start until I know the laws.