How do you get licenses to buy automatic weapons?

You find a Class III licenced dealer, and they'll go through the paperwork with you. You'll have to go through an extensive background check, and you'll need to be approved at both federal and state level (and, in several states, county, as well).
You find a Class III licenced dealer, and they'll go through the paperwork with you. You'll have to go through an extensive background check, and you'll need to be approved at both federal and state level (and, in several states, county, as well).