Close the loophole, prevent domestic abusers from owning guns and reinstate the assault rifle ban. Also create a national standard for concealed carry

The only way to get a firearm that is fully automatic (hold down trigger, bullets come out until empty, not SEMI automatic, hold down trigger, only one bullet come out until you release and let the trigger reset before firing a subsequent shot), legally, is to be a dealer with an FFL. Otherwise the easy, (ten years in jail minimum) way is to take shop class, get/make a tube, spring, striker, and sear, with a magazine well and ejection port. You can also try being in a cartel or foreign partisan group, and the US Gov will just give them to you...bad guys have all the fun stuff.

domestic abusers and other violent offenders already lose there right to have firearms all the time.