ok so i am looking to get into gunsmithing, and was wondering if there was a single place i could go to for all the information and procedures like sale and induction of guns and all of these legal things, like a book or website something, the ATF has basic guidelines but nothing useful to start. i was an armorer in the usmc who also worked as a 2112, so i have the repair exp on gun, just not the legal exp on civilian sale and stuff.