I recently acquired a Colt SMG (9MM AR basically) for use at work and while not full auto, it does have a 3 shot burst mode
. I could not believe how controllable and accurate this thing is, but it very quickly puts all three rounds in a very tight group. I very quickly destroyed all of the cans and bottles on the local outdoor range, and the county provided all of the ammo to do it with! HOW NICE!!!