Colt Defender Semi Automatic Metal Frame .177 Caliber BB

auto177 About 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 is. The 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

auto177, The 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.