Someone I know who has tooling to machine steel (think CNC big enough to build an engine block) was asking me which parts can be legally manufactured without requiring extra paperwork. Using the AK as an example, I said that he can make everything -- trunnions, trigger, bolts, etc -- but the receiver without needing to talk to the BATF.
Is there official documentation I can use to back up my reply?
Is there official documentation I can use to back up my reply?