Open bolt gas blowback system Realistic field stripping the upper and lower receiver Monolithic top rail for mounting a slew off accessories (aftermarket iron sights, micro dot sights, rifle scopes) 16-inch metal outer barrel is sturdy and pairs with a precision inner barrel for accuracy Mock aluminum gas block for realism Ventilated modular handguard that lessens overall weight Ambidextrous fire selector switch to selec semi-automatic, full-automatic shooting Flip-up front and rear sights to use inconjunction with any aftermarket optics Retractable/foldable stock to customize for your arm length and minimize fatigue Detachable rail segments for attaching Picatinny-compatible accessories Waffled 30rd green gas magazine is gas efficient and is easy to gripSpecifications: Brand WE Tech Operation Gas Blowback Build Metal Upper & Lower Receivers, Outer Barrel, Buffer Tube / Polymer Stock, Pistol Grip Firing Modes Semi-Automatic, Full-Automatic, Functional Safety Magazine Capacity 32 Rounds Propellant Green Gas Length 33 / 39 (Retracted / Extended) Color Black 1X Rifle