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.RECEIVER EXTENSION: AR Pistol Receiver Extension.CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps.LOWER RECEIVER: Mil-Spec with Enhanced Flared Magazine Well and Rear Receiver QD Swivel Attachment Point.RAIL LADDERS: 3 low profile ladders made from Santoprene, heat resistant to 300° F.PISTOL GRIP: Daniel Defense Pistol Grip, Glass Filled Polymer with Soft Touch Overmolding.BUTTSTOCK: Daniel Defense Buttstock, Glass Filled Polymer with Soft Touch Overmolding.RECEIVER EXTENSION: 6 Position Mil-Spec 7075-T6 Aluminum.CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7075-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized.HANDGUARD: Daniel Defense MK18 RIS II, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized.BOLT CARRIER GROUP: M16 Profile, 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 and Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement.

10 inch quad rail mk18