Propane powered! Can be configured for HFC134a too. * Completely re-useable. Just reload bbs and gas! * Blasts over 200 plastic 6mm pellets in a full 3D scatter. Not a shotgun blast or a disc distributio * Tough design survives gazillions of throws! We don"t know how many blasts to failure, but we"ll kee * No loose parts to collect. Keep track of the pull pin though.