I've seen in quite a few different sections questions about ATF rules and regulations and would like to weigh in. I put it here 'cause those questions arise the most here. If ever you have any questions concerning ATF regs concerning manufacture, dealing, full auto, etcetera I would go straight to the "horse's mouth". The ATF website ( ATF Online - Firearms - Industry ) has an excellent FAQ as well as has people devoted to responding to letters and emails about the regs. If ever any question or answer is in doubt, email them. Their response is a legally binding interpretation of the regs. Also, reg books and such are free for the asking in their document section. Hope this cuts down on some clutter around here.