Description Daniel Defense’s DD4 RIII Upper Receiver Group is a perfect start to a custom AR build. It comes equipped with Daniel Defense’s mid-length gas system – a design known for its smoother recoil impulse to make rapid fire more accurate. It features a 12.5 inch lightweight RIS III rail—modeled after the revolutionary RIS II two-piece handguard developed for SOCOM—features M-LOK attachment for lighter weight while still offering M203 grenade-launcher attachment. In addition, the DD4 RIII Upper Receiver Group comes standard with a Chrome Moly Vanadium government profile barrel. Features: 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, 16″ Government Profile, Mid-length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate Coating, Mid-length, Direct Impingement MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished HANDGUARD: RIS III 12.5”, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment 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 Specifications: Caliber: 5.56 NATO Rifle Barrel Length: 16″ Rifle Barrel Twist: 1:7″ Iron Sights: No Caliber or Gauge: 5.56 x 45mm NATO Item Condition: New Product Type: Upper Receiver Additional information Weight 54 oz Dimensions 17.5 × 2.2 × 3 in Receiver Material 6061 Aluminum Feed Ramps M4 MPN 23-191-20088-006 UPC 818773023399
