This cool video is from Discovery Channel's Future Weapons show, which is one of my favorite TV shows. In this 8 minute video you'll see one of the latest recoilless shotguns which is able to fire up to 300 rounds per minute, obliterating everything in its path! Pretty useful, huh?

The Beretta Xtrema2 is an amazing weapon compared to anything seen so far. It's a recoilless shotgun, able to reach astounding shooting speeds. This guy shows his mastery of this guy by shooting it one handed, on different numbers of targets. It's pretty cool. Enjoy ;)

A gauss gun, works by sequentially accelerating a projectile to a desired speed by using either magnets or coils. The first video is a small demonstration of the principle behind the whole thing, by using magnets. The following videos are weapons which were homemade, and as you can see work remarkably well. So well in fact, that the US Navy will implement such weapons on its ships by 2020, after they succesfully tested an 8 Megajoule prototype.