wg model-4331 sport 331 metal slide co2 blowback pistol/black(Airsoft Gun) New Generation Gas Blowback System. High Power Output, Performance, Range, Accuracy, and Durability Railed Frame for Tactical Light, Laser and other Accessories Ergonomic Polymer / Textured M9 Military Type Hand Grip. Adjustable Rear Sight, Integrated Glow Sights