The all-metal construction of the Colt Defender makes it one of the most realistic and reliable air pistols on the market today. The Colt Defender comes with a 16-round magazine that complements the pistols semi-automatic action. The spring-powered grip release of the CO2 compartment and the Defenders well-made magazine combine to make this pistol incredibly easy to operate - perfect for those who are new to the world of airguns. The pistol is realistically heavy. In fact, its as close as you can get to owning the real thing. The Colt Defender is powered by a 12g CO2 capsule, and will provide 30 - 40 shots per capsule, depending on air temperature.