Daniel Defense MK18 RIII Upper Receiver Group

Daniel Defense MK18 RIII Upper Receiver GroupThe MK18 AR15-style Upper Receiver Group is unmatched in size, weight, and performance, and features the new Daniel Defense RIS III rail. The lightweight RIS III rail-modeled after the revolutionary RIS II two-piece handguard developed for SOCOM-features M-LOK attachment for lighter weight. The 10.3-inch Cold Hammer Forged barrel is the same length as the MK18 upper, most commonly used for CQB operations. Its independently ambidextrous GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.Specifications 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, 10.3" Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested Gas System: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine 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 RIS III 9.5, Patented, 6-Bolt Bolt-Up System, Flat Dark Earth CNC Machined of 6061-T6 Aluminum Charging Handle: GRIP-N-RIP Charging Handle, Body CNC Machined of 7076-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized Made in the USA!