Lower Receiver: Mil-Spec with Enhanced Flared Magazine Well and Rear Receiver QD Swivel Attachment Point. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized; Upper Receiver: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized; Barrel: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:8 Twist, 10.3" S2W Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested; Gas System: Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Pistol Length, Direct Impingement; Muzzle Device: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished; Bolt Carrier Group: M16 Profile, Chrome Lined, Mil-Spec MP Tested, Properly Staked Gas Key; Handguard: MFR 9.0 M-LOK, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized, Black; Daniel Defense Pistol Grip, Glass Filled Polymer with Soft Touch Overmolding; AR Pistol Receiver Extension; Made in the USA