What is the maximum rate of fire for an M4 on SEMI?

The M4 carbine, when set to the semi-automatic (SEMI) firing mode, has a maximum rate of fire of approximately 45 to 60 rounds per minute. This rate depends on the shooter’s ability to pull the trigger and reset it for each shot. Unlike fully automatic modes, where the weapon continues to fire as long as the trigger is held down, SEMI requires a separate trigger pull for each round.