It's a tank...
I found this:
"The traverse and elevation of the turret was hydraulic, making a full elevation in little over 4 seconds, and a full traverse in 15.5 second."
and
"Each of the four mounted guns fired from a 20-round magazine at a maximum combined rate of fire of 1,400 rounds per minute (reduced to 800 rounds per minute for combat use). "
So anywhere from 2'20" to 4' of continuous fire.