it's not called metal storm, it's made by metal storm of brisbane, australia.. the designer is a guy called O'Dwyer (see the VLE he designed, genius). the rounds are stacked behind each other in the barrel, and best of all, it can be programmed to fire in pretty patterns. there is also a model that fires mortar rounds, apparently (thought they look more like 40mm bombs).
Now thats my kind of foogin speed camera.....62 mph Brrrtt
Im gobsmacked this is australian though, it sounds more american to say "what we only put 4 rounds into him? balls to that lets put a million rounds into one guy in half a second, thats freakin stopping power!
I really fail to see the application of this apart from maybe load it with mortars or something...