The M1911 MK IV is a professional grade gas blowback airsoft training pistol. This airsoft gun is made by KWA to strict quality control standards. KWA has a reputation for manufacturing amazing gas blowback airsoft guns, and this 1911 is no exception. The NS2 system delivers power and performance. This pistols shoots at 345 FPS with 0.20g BBs. The hop-up is easy to adjust using the included hop up adjustment tool. Unlike brands other gas blowback pistols, you do not have to take the slide off to adjust the hop up. The NS2 gas system is very gas efficient and also delivers crisp blowback action. The MK IV has a functional thumb and beavertail safety. The gun is complete with a tactical rail on the lower part of the frame which can be used for adding accessories such as lasers and flashlights. If you're looking for a high quality 1911 look no further! This airsoft gun should only be used with green gas. Using propane can damage the gun and will void the manufacturer's warranty.