If you're looking for a serious Airsoft pistol then you need to go with CO2. With Firepower of 500 FPS this Airsoft pistol isn't for the faint of heart. The durable body makes the gun feel solid and gives it a realistic weight. So if you're looking for a great CO2 gun then do yourself a favor and get the CO2 WG Airsoft Gun today! Please, pay attention: CO2 cartridge is not included, you should be it separately