Fully Licensed Walther Trademarks Full Metal Slide with Front and Rear Slide Serrations, Barrel, and Blowback Assembly High Strength Nylon Reinforced Polymer Frame Ergonomic, Textured Pistol Grip Fixed Front and Adjustable Rear Sights Adjustable Hopup System Functioning Trigger Safety 20mm Lower Accessory Rail for Tac Lights, Lasers, etc FPS Range: 260-290 Dimensions: 180mm x 140mm Muzzle Velocity: 260~290 FPS (Measured w/ 0.20g BBs and Green Gas) Magazine: 22rds Gas Type: Green Gas, Red Gas, Propane Firing Mode: Semi Automatic, Safety System: Gas Blowback Hopup: Yes, Adjustable Package Includes: Gun, Magazine, and Manual Manufacturer: Umarex (Licensed by Walther)