Gas powered grenade shell for SunProject M203 launcher & CAW M79. This special version denoted "HP" for "High Power" is CO2 capable, with a lightened activation valve for easy launch! All metal construction with attractive anodized finish. Fires 204 BB's at a time - loads of fun and huge bang and cloud emitted when fired! Stronger valve system means no more stuck valves like on the Mosquito Mold versions. High powered design allows use of CO2 and RED GAS for over 80-100 feet of effective coverage. Very powerful and wide dispersion!