We've all used rubber bands as ammunition in battles with our best friends or to bother annoying siblings. But the most difficult part of rubber band combat is the slow reload speeds. YouTuber The Q has alleviated this problem with a rubber band machine gun constructed primarily of cardboard. This contraption can hold up to 120 rubber bands and can shoot as fast as you can turn a crank. All you need to create this DIY project is cardboard, wood, ice pop sticks, and, of course, rubber bands.