Full metal upper & lower receiver, buffer tube and rails Version 2 gearbox with quick-change spring system KeyMod rail system to attaching foregrips and other accessories Rotary style hop up for easy adjustment Extended mag release for quicker mag changes Flip-up front and rear iron sights for target acquisition Licensed ICS AEG magazine with high capacity High Capacity 300 round magazineSpecifications: Operation Electric Blowback (EBB) Build Metal Receivers, KeyMod Handguard / Polymer Stock, Motor Grip Firing Modes Semi-automatic, Full-Automatic (w/ Safety) Muzzle Velocity 420 - 440 FPS (w/ 0.20g BBs) Magazine Capacity 300 Rounds Gearbox Full Metal Version 2 (w/ Quick Change Spring) Battery 7.4V or 11.1V Li-Po Buffer Tube Battery (Not Included) Hop-Up Yes / Adjustable Weight 9 lbs Overall Length 35.3 - 31.6 Inches (Extended / Retracted) Barrel Length 375 mm Color TAN 1X AEG Rifle