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, 1:7 Twist, 16" Government Profile, Mid-length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested; GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate Coating, Mid-length, Direct Impingement; MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished; BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key; SIGHTS: Sold Separately; HANDGUARD: Daniel Defense MFR 15.0, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment, Type III Hard Coat Anodized; GRIP: Daniel Defense Vertical Grip, Glass-Filled Polymer, M-LOK; FINISH: Black