BackyardArtillery sells plans ($29) for making your own rubber band machine gun – “This beauty is a fully funcitonal machine gun with TWELVE rotating barrels and a live action trigger. Loads 12 bands per barrel for a whopping 144 rubber bands that shoot off as fast as you can turn the handle! Great fun for kids of all ages…The rubber band machine gun uses a similar mechanism to the famous Gatling Gun of the old west. It stands 40 inches tall and 44 inches from the handle to the tip of the barrels. The turret effortlessly spins a full 360 degrees and tilts from 45 degrees up to 22 degrees down so you can easily keep a moving target in your sights, no matter where it goes.” [via] – Link.
Update: MrKazee says “… the description listed in this posting is NOT the same as the gun shown in the plans. following the link to the $29 plans, it is listed as a smaller 72 shot version.” – Read the comments for some other posts regarding these plans/project.