The ranges where I have shot would not allow you to shoot your MG on the pistol range in spite of using pistol ammo. They don't allow pistol caliber carbines like the Beretta Storm either. Two don't allow FMJ ammo either
"If you look through your scope and see your shoe, aim higher."
-- said to me by my 11 year old daughter before going out for hogs 8/13/2011