Rise Armament AR-15 Upper Receiver Assembly 6mm ARC 18" Barrel 15" M-LOK Handguard Rifle Length Dark Gray

The RISE AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel fluted and threaded barrel. FeaturesBarrel: 18-inch 416R stainless steel, fluted, button-rifled, air-gauged and tested; threadedHandguard: Free-floating skeletonized aluminum with continuous 12 o'clock Picatinny rail, MLOK slots, four threaded steel sling swivel QD inserts, a snag-free front, and patent-pending attachment lock to maintain your zeroCharging Handle: RISE ambidextrous charging handle for right- or left-handed operation and improved ease of use with optics and glovesBolt Carrier Group: Premium BCG with 9310 bolt, individually MPI tested, staked gas key, durable black nitride finishReceiver: Forged billet aluminum