Well Airsoft M4 AEG Carbine Assault Rifle Fixed Stock - Tophatter's Guns'N'Weapons StoreWell Airsoft M4 AEG Carbine Assault Rifle Fixed Stock Features: Durable ABS Plastic Construction Optics Rail Adjustable Rear Sight Fixed Stock Specifications: Operation: Electric Automatic Build: ABS Plastic Construction Firing Modes: Semi automatic, Full automatic, w Functional Safety Muzzle Velocity: 250 255 FPS (w 0. 20g BBs) Magazine: 210rd High Capacity (gear wind up) Battery: 8. 4V Mini Brick (Not Included) Hop Up: Adjustable Weight: 2. 45 lbs