Metal Storm

I have seen the future and the future is fast. I'm not kidding. The title on this is no joke. I'd heard of million round per minute weapons, but now I've seen them. Test firing of 180 rounds in just over a hundredth of a second - they sound like one round fired.
It's something you kind of need to see to believe, but if you don't have a fast connection, forget it. The files are huge (over to 330 megs all together), but at least read and check out the pics.
Jaw-droppingly amazing, but a little scary at the same time. Also, fully electronic "smart" handguns. Choice of lethal/non-lethal rounds and thumbprint recognition. That way, you can't get shot with your own gun. You could still get beat over the head with it though.