what is the name of a new type of gun or missle launcher that stores rounds in columns and rows?

Question

and fires a ridiculous amount of rounds per second. i think i saw it on discovery or "mail call". The device looked kind of like a box with holes in it and the rounds were lined one behind the other to be fired off

Answer 1

Metal Storm

From the below website:
Metal Storm technology is an electronically initiated, stacked projectile system that removes the mechanisms required to fire a conventional weapon. Effectively, the only parts that move in Metal Storm’s technology are the projectiles contained within the barrels. Multiple projectiles are stacked in a barrel. The technology allows each projectile to be fired sequentially from the barrel.

Answer 2

Column storing gravity fed multi barreled Gattling gun. 2000 RPM

Answer 3

You beat me to it, it's metal storm...when will it be deployed is what i want to know.