UMAREX FUSION 2 COMBO .177 CO2 AIR-RIFLE W/ 4X32MM SCOPE FEATURES: .177 Caliber SilencAir technology Picatinny scope mounting rail M-Lok slots on the sides of the stock for accessories Powered by (2) 12g CO2 or (1) 88g CO2 Ambidextrous thumbhole polymer stock 700 FPS w/ alloy, 650 FPS w/ lead Single stage trigger Over 70 shots on (2) 12 gram cartridges Bolt action 4x32 scope and (2) 9-round pellet mags included