UpperBarrel Length-5.5Barrel Material- 41V50 Button Rifled BarrelChamber 9MM NATOTwist Rate 110Muzzle Device Milspec A2 birdcage 1/2-36Charging Handle- Milspec with Enhanced Large Billet LatchUpper Receiver- Forged 7075 T6 Aluminum, Precision MachinedHandguard- 4, High Quality 6061 T6 Material Mlok with Proprietary Clamping System and Heavy-Duty Barrel NutBCGOne piece BCGAuto Profile Carrier Machined from Aircraft/ Bearing Quality 8620 Steel, Properly Heat Treated, Ground to Perfection, BlackNitride Finish by H&MFiring pin is machined from 8740, precision ground, and chrome platedOne Piece Billet Fully Machined Enhanced Extractor, Phosphate coated for Increased reliability and corrosion resistanceS7 tool steel ejector and extractor retaining pin4130 Gas Key, nitride, precision staked using our hydraulic staking machineCarrier key screws- Grade 8, Properly Heat TreatedLowerKAK Industries billet AR15 lower receiver is precision CNC machined from a solid block of high quality aircraft grade aluminum. All internal dimensions are cut to the proper military dimensions. Full M4/M16 spec fire control pocket. All receivers are media blasted and have a deep lustrous hard coat anodizing. Machined from a solid block of aircraft quality aluminumFull M4/M16 style fire control group pocketCompatible with Colt style magazinesPictogram selector markings on both sidesAccepts all standard/Milspec AR15 componentsCompatible with drop in trigger assembliesTumbled, deburred, media blastedCaliber MULTIType 3 Class II hard coat anodized - deep matte blackFire Control Group- MilspecGrip- A2Pistol Buffer TubeIncludes 1x 30 Round Magazine (where applicable)All KAK complete firearms are test fired for feed and function using commercially loaded ammunition