Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized. 16" 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 Barrel. Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate Coating, Mid-length, Direct Impingement. with a Daniel Defense Flash Suppressor. SIGHTS Sold Separately. RIS III 12.5”, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment Handguard. 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. NEW. UPC: 818773023672 (STOCK PHOTO)