Yo @Xil I have shot many full autos. Did a Mac10 in 9mm with silencer (POS imo). The silencer had brass baffles on the inside to suppress the sound. The brass baffles need to be replaced often. Besides, the sound downrange is as effective as the lead for duck and cover.
Even bump firing the AR or AK, the damned barrels/gun gets screaming hot. They are air cooled.
I have always found the 3 round burst mode to be most accurate. Full auto requires a side of a barn for a target.