... I know it's legal to own a Class III firearm and frequently not even that difficult to get -- depending on your location. But, where and how can you LEGALLY use one? Hunting would be a no-no, obviously, and any range to which I've ever been would go nuts (and not in a good way) if I opened up with an fusillade on a target. Even shooting on private property would draw the police once the neighbours reported hearing automatic gunfire. It would be a true waste of both time and money if these weapons just sat around being looked at. It would be like having a trophy wife who couldn't leave the house.
In this dandified world in which we've created, I can only imagine firing automatic weapons outside of a military base would be looked upon like someone smoking a cigar in a nursery school.