Umarex StrikeForce Full Auto .177 BB Gun | Umarex

auto177About this item . 18-shot, .177 caliber BB air pistol with realistic blowback action ; Powered by a 12-gram CO2 cartridge (CO2 NOT included. To ensure a proper seal and for best performance, Umarex-brand CO2 isThe Umarex StrikeForce gives you a full auto CO2 BB rifle desned to remind you of the familiar looks and operation of an SBR firearm. You'll enjoy speeds up to 450 fps for exciting