Magnum Enterprises Colt Derringer Pistol Rubber Band Gun The Magnum Colt Derringer is a classic pocket pistol to be enjoyed by any collector or child and is perfect for reenacting shoot-outs or participating in target practice Designed for use with our GREEN rubber band ammunition (sold separately) All Magnum Enterprises rubber band guns, swords and other products are 100% American-made using solid, high-quality wood Gun Length: 8.75''. Rubber band Stretch: 6.5''. Recommended for ages 14 years old and up