Not even close.....an AR-15 has a sustained rate of fire of ~300 rounds a minute, the same AR with a bump stock will be ~400-500 rounds a minute.....an actual M-16 select fire automatic has a rate of fire of over 900 rounds a minute......unlike the AR though, an M-16 (or any other automatic) has a firing pin, bolt carrier, sear/springs etc designed to tolerate said rate of fire....increasing a gun's rate of fire, to what it wasn't intended to operate at, at best will wear the firearm out faster, at worse, the operator will get a bolt carrier buried into his forehead after the gun stovepipes a round and the cartridges psi blows-up the guns receiver in the operator's hand with said operators head inches from such a failure.
"Trained hands" don't operate unsafe firearms.......full stop.
Charles Whitman killed and injured dozens with a four-shot bolt action deer rifle........ "trained hands" (the person committing the act) and the type of firearm used is the disconnect here, but doesn't really mater......so why do people like you keep bringing it up?