Urban gangs prefer pistols, and maybe the occasional Mac. They fire pretty much randomly large quantities of wasted ammo. I can't see how many of them would be well trained in shooting, and evidence says most are not. Spray and pray.
Hunters and the like would take them out at long range if it came to it, meaning anything over 50 meters really. So yeah, they are not well trained and their arms are not useful in a real fight.