Bipod adapter allows for steady aiming on uneven surfaces. Free float RIS handguard which includes a replica gas tube for a more realistic feature. Full length Picatinny rail for accessory attachments. Detachable QD mock suppressor is included for a great value. Hi-Torque motor long axis has a measurement of 16000 RPM . Ergonomic motor grip for a comfort fit. Full metal build give airsoft a more authentic feel for the airsoft user. Low profile flip up sights can be flipped up for better precision. Great airsoft to use for film making use.Specifications: Operation Electric Automatic Build Full Metal Body, Gearbox, Upper Receiver & Lower Receiver Firing Modes Semi-Automatic, Safety Mode Muzzle Velocity 385-400 FPS (w/ 0.20 BBs) Magazine 50 Rounds Gearbox Version 2 (Metal) Battery 7.4V LiPo Battery (not included) Hop-Up Yes, Adjustable Inner Barrel 510mm Weight 6 Lbs Length 39.4 Inches Color BLACK 1X AEG Sniper Rifle