Upper Picatinny/Weaver style rail for optic accessories. Built-in vertical polymer foregrip for easy handling. 6.03mm tightbore inner barrel. ARES Electronic Firing Control System. Foldable skeletonized stock for stability. Easy access for quick spring change system. AIncluded 300 round AEG magazine. Nylon fiber dust cover easily flips up to reveal dust cover Flip-up front and rear polymer sights for precision.Specifications: Operation Electric AutomaticBuild Full Metal RIS, Gearbox / Nylon Polymer Pistol Grip, Muzzle, StockFiring Modes Fully Automatic, Semi-Automatic, Safety ModeMuzzle Velocity 340-375 FPS (w/ 0.20 BBs)Magazine 300 RoundsGearbox Version 2 (Metal)Battery 8.4V Stick (Sold Separately)Hop-Up Yes, AdjustableWeight 2.84 LbsLength 17.7-23.48 Inches (Collapsed-Extended)Color BLACK 1X SMG