FPS Range: 300-340 This is the "PTP" line of M9 Gas blowback by KJW. This very model is being used by US Military & Law enforcement for training today, hence it's performance and realism. Externally, this pistol is as real as it gets with blowback action, full metal slide & frame, on frame safety, magazine release, shooter's grip, hopup and tons more other features. Basically, it is the one gas gun with the most metal parts in the market today. Internally this new version is equipped with the newest reinforcement parts that are so durable you can power it with Co2, Propane or red gas. Manufacture: KJ Works Dimensions: 8.5" Long x 5.25" Tall. Barrel Length: 5". Weight ~2 lbs. Muzzle Velocity: 300~340 FPS. Magazine: 25+1 (Green gas Mag included. Co2 Mag available) Power: Green gas, propane adapter, red gas, CO2. Hopup: Yes, non-adjustable.