HANDGUARD: Daniel Defense RIS II MK18, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized.BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key.MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished.GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement.BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 10.3' Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested.CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps.It is the buyer's responsibility to make sure they comply with all NFA rules and applicable laws. Please check with your local and state municipalities for any further regulatory requirements. Once this part is assembled into a complete firearm, it becomes a regulated item by the National Firearms Act (NFA).

Daniel defense 10 inch quad rail