Designed and built for the US armed forces for training purposes. One of the coolest shells to come along in a long time! Madbull M576 Soft Rubber Trainning Shell fits CAW M79 / Sun Project M203 / Mini Launcher / Revolver Launcher / GB-TECH Launcher. Shell uses HFC134a / Top Gas / Red Gas to ejects a rubber warhead at very high velocities to propel the rubber head over a large distance to hit opponents. Very air tight for maximum effectiveness! Effective distance of about 50 -70 feet. High quality rubber head is durable and hurts! Add variety to your game and declare all opponents within 10 feet of impact dead! Loads of fun and very loud when fired! MSRP $60, our price $55! Higly recommended by RedWolf! User tested and recommended!