Lower Receiver: Mil-Spec with enhanced flared magazine well and rear receiver QD swivel attachment point; CNC machined of 7075-T6 aluminum; Upper Receiver: Mil-Spec with indexing Marks and M4 feed ramps; CNC machined of 7075-T6 aluminum; Barrel: Chrome moly vanadium steel, cold hammer forged, 1:7 twist, 16" Government profile, Mid-length Gas System, chrome lined, MP tested, and Mil-Spec heavy phosphate coated; Gas System: Pinned low profile gas block CNC machined of 4140 hardened steel and Mil-Spec heavy phosphate coating, 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; Handguard: Daniel defense MFR XS 15.0, CNC machined of 6061-T6 aluminum, M-LOK attachment; Receiver Extension: 6 position Mil-Spec 7075-T6 aluminum; Buttstock: Daniel defense buttstock, Glass filled polymer with soft touch overmolding; Made in the USA