500 rpm's on semi auto. 8.3333 trigger presses per second, repeated 120 times without pause.
Might not be good for the bad guy's trigger finger. One heck of a case of carpal-tunnel, probably requiring a trip to the gub'mint assisted health care waiting room. Bad guy will probably expire waiting for treatment.
Math rooles. Perhaps the LEO was mixing up his stats, and confused semi-auto rate of fire with the rate the Fed is printing funny money.