That zipper noise: To think that those are 30mm rounds being fired at that speed is just plain scary. http://www.xdtalk.com/attachments/img_7014-jpg.34438/

If one of those is lingering, I wouldn't even fight if I was the enemy.

It might not be able to kill a modern main battle tank, but I bet spraying it with rounds like that would fuck it up pretty seriously.