I don't quite understand the game.
It's either use the 3 bullets gattling, or either use the laser which fire every lasers.
Who'd play something else when you can't group your weapons?
Hum sorry for the comment below, it seems like kongregate doesn't like \n. Anyway. How are you supposed to use 4 support items when you have only 3 keys (2, 3 and 4) ?