Injection molded polymer lower receiver with aluminum alloy upper receiverMonolithic keymod handguard with full length 20mm accessory rail, ideal for mounting optics or other accessoriesAdjustable low profile polymer stockAmbidextrous magazine release and fire controlsFull metal version 2 gearboxFront and rear flip up sightsUtilizes standard M4/M16 style magazinesLength:690mm -750mmWeight:2500gInner Barrel:363mmMagazine Capacity:120rd mid-Capacity. Works with Tokyo Marui, G&G;, Umarex and other compatible M4 Series Airsoft AEG MagazinesThread Direction:14mm negativeGearbox:Ver 2 Full Metal, Fully UpgradeableMotor:Long TypeFire Modes:Semi/Full-Auto, SafetyBattery:7.4v Small Type recommended (Wired to the stock with a Small Tamiya connector)Hopup:Yes, AdjustablePackage Includes:Gun, 2x rail segments, sights, vertical grip