The Can Cannon is a 100% legal soda can launcher for your AR-15 / M16 rifle. The Can Cannon is perfect for launching soda cans and other similarly sized objects such as tennis balls, paint cans, t-shirts, or the X Products Grappling Hook You can view and print the full BATF approval letter by clicking this link . The Can Cannon is a patent pending launching device for soda cans and other heavy, thin walled objects. A proprietary gas ported barrel and pressure tube reduce the exposure to high pressure gasses which could destroy relatively delicate projectiles. The Can Cannon is currently configured for launching full, un-opened 12oz soda cans. When used with standard mil spec blanks and fired at an optimum angle it can reach an average distance of 105 yards!