This builder created a pretty amazing machinegun/chaingun that shoots rubberbands. The gun is built completely out of LEGO. It supposedly fires 11 rounds per second.
Check out the amazing fan creations at LEGO Brickvention 2016, held in Melbourne, Australia. Includes our interview with Ryan "The BrickMan" McNaught, the only Certified LEGO Professional in the Southern Hemisphere. Be inspired - we were!