One man's LEGO is another man's treasure, and what better way is there to guard your grand stash of colored bricks than by using the bricks themselves as a weapon The Thriller Automatic and Thriller Compact are slide action crossbow pistols with cocking and chambering mechanisms that are almost completely made out of LEGO Martin H_depohl, a German designer and the man who built this amazing monstrosity, has a video of the gun in action Pew pew Instructions on how to become your own LEGO arms dealer can be found in H_depohl's book, LEGO for Adults