i was wondering if you grinded certain parts on a uzi down so that the bolt does not catch would that be legal? the law states that if a firearm fires more then one round per pull of the trigger it counts as a mg. however here is were i am confused. a person iknow who will remain unnamed grinded certain parts on a uzi so that when u pull back the slide it keeps firing with out touching the trigger. does this count as a mg? or not i sent atf a letter requesting info they have yet to reply!