BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:8 Twist, 10.3" S2W Profile, Chrome Lined, Heavy Phosphate Finished, and HP/MPI Tested; GAS SYSTEM: Pinned Low-Profile Gas Block CNC Machined from 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, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key; HANDGUARD: Daniel Defense DDM4 Rail 9.0, CNC Machined from 6061-T6 Aluminum, Type III Hard-Coat Anodized; RECEIVER EXTENSION: Six-Position Mil-Spec 7075-T6 Aluminum; BUTTSTOCK: Daniel Defense Buttstock, Glass-Filled Polymer with Soft-Touch Overmolding; PISTOL GRIP: Daniel Defense Pistol Grip, Glass-Filled Polymer with Soft-Touch Overmolding; GRIP: Daniel Defense Vertical Grip, Glass-Filled Polymer with Soft-Touch Overmolding; RAIL PANELS: Daniel Defense Rail Panels made from Santoprene, Heat Resistant to 300 degrees Fahrenheit