12 inch CNC machined M-LOK Rail System. Combo pack comes with battery and charger for a great value! Integrated mock suppressor is included. Three set of side rails to add aftermarket accessories. PDW retractable stock with side button release. Battery placement is sealed with a cover located in the back of the stock. Advanced hi-torque long axis motor with 17000 rpm. Consecutive full length top rail allows for optic attachments. Contoured motor grip design for improved grip and comfort. Polycarbonate hop-up chamber with adjustable dial knob for ease of use. Full metal M-LOK rail system, flip-up front/rear sights. Full metal tightbore barrel, cylinder head, neodymium magnets, and gearbox internals. High density polymer upper and lower receivers. High capacity flash magazine for rapid winding. Reinforced nylon polymer waffle magazine for easy handling and a comfort grip. 380 FPS muzzle velocity is capable to be used in most outdoor fields. Ambidextrous magazine release makes it easy for both conventional and southpaw shooters. Ambidextrous fire mode selector switch includes semi-auto, full-auto, and safety mode. Ambidextrous charging handle opens up dust cover and access to the hop-up wheel. Two sling mounts are located in the front, two toward the rear, and one sling in the stock. Ergonomic motor grip that can fit most hand sizes. In the Box 1X AEG Rifle 1X 300rd Magazine 1X Battery 1X Charger Specifications: Operation Electric AutomaticBuild Full Metal Rail System, Receivers, Gearbox / Nylon Polymer Magazine, Pistol Grip, Muzzle, StockFiring Modes Fully Automatic, Semi-Automatic, Safety ModeMuzzle Velocity 405 FPS (w/ 0.20 BBs)Magazine 300 RoundsGearbox 8mm Ball BearingBattery 7.4V Stick (Sold Separately)Hop-Up Yes, Adjustable Rotary TypeInner Barrel 6.03mm DiameterWeight 4.5 LbsLength 31 Inches California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov