Rotary style hop up for easy adjustment Extended mag release for quicker mag changes M-LOK rail system attaches foregrips and other accessories Flip-up front and rear iron sights for target acquisition Version 2 gearbox with quick-change spring system Full metal upper & lower receiver, buffer tube and rails Licensed ICS AEG magazine with high capacitySpecifications: Operation Electric Blowback (EBB) Build Metal Frame / Polymer Furniture Firing Modes Semi, Full-Automatic w / Functional Safety Muzzle Velocity 395 FPS (w/.20g BBs) Magazine Capacity 300 Rounds Gearbox Version 2 Gearbox Battery 7.4V or 11.1V Li-Po (Not Included) Hop-Up Yes / Adjustable Weight 9 lbs Overall Length 32.75 - 35.75 Inches (Extended / Retracted) Barrel Length 375mm Color BLACK 1X AEG Rifle