Barrel: 18-inch 416R stainless steel, button-rifled, air-gauged and tested; threaded. Handguard: Free-floating skeletonized aluminum with continuous 12 oclock Picatinny rail, MLOK slots, four threaded steel sling swivel QD inserts, a snag-free front, and patent-pending attachment lock to maintain your zero. Charging Handle: RISE ambidextrous charging handle for right- or left-handed operation and improved ease of use with optics and gloves. Bolt Carrier Group: Premium BCG with 9310 bolt, individually MPI tested, staked gas key, durable black nitride finish. Receiver: Forged billet aluminum