This has to be the coolest thing ever assembled with Legos. And the best part is, its fully functional!

Jack Streat was able to create this replica of a Heckler & Koch UMP 45 sub machine gun, exclusively from Legos. And with all great people who have a lot of time on their hands, this isn't the only thing he as created from the toy.

Check out his YouTube Page for more creations and check out his Lego Machine gun below. It may not disable your attackers, but wait until they step on one of those bastards barefoot.