KWA H&K MK23 US SOCOM AIRSOFT GBB Pistol Overall Length: 25 cm [9.84"] Overall Height: 15 cm [5.91"] Inner Barrel Length: 130 mm Inner Barrel Diameter: 6.05 mm Weight: 1.16 kg [2.56 lbs] Barrel Thread: 16mm positive Caliber: 6mm bb. (0.20g or heavier high grade bbs recommended.) Magazine Capacity: 25+1 rounds Velocity: [360-380 FPS] Gas System: KWA New Structure 2 (NS2) Propellant: Green Gas / Propane adapter Manufacturer: Heckler & Koch. OEM: KWA (Licensed by Umarex USA) Package Includes: Pistol, Magazine, Hop-Up adjustment wrench and manual. Special Features: - Safety / decocking lever - Ambidextrous safety lever - Ambidextrous magazine release - Accessory rail - Threaded barrel - 3-dot combat sight - Adjustable Hop-Up - Realistic construction and field stripping - High Impact Polymer outer barrel and frame. - Realistic Hard Kick Gas Blowback.