Belt fed? There's a guy in Pocatello with a "Rat Patrol" style truck with a belt-fed .50 cal mounted. He takes it to the range on occasions. It's a noisy, expensive novelty. We have a couple FFL's in town licensed to work on the full auto stuff. The sheriff is pretty decent about it too. Too expensive for my budget.
Well of course!
(but I’ll really only need a round or two to warn non-yielders and tailgaters)....;)