more like the kind of machine gunfire that you would see in war, which is what was unleashed on this concert crowd last night. a semiautomatic firing mechanism is designed to fire every time you pull the trigger, but you can install a double tap trigger or a trigger that can double the firing speed by making the gunfire twice, once on the pull and once on the release, so that can double your speed. you can also use something called a trigger crank. i think it sometimes gets called a gap crank. a trigger crank or gap crank basically just is a mechanism that pulls the trigger mechanically using the crank the way and that makes the trigger get pulled way faster than you can fire yourself for any sustained amount of time. you can also use something called a bump stock, which is a modification to the stock part of the gun that goes up against your shoulder, slides back and forth in such a way it uses the