RISE Armament's Watchman XR Upper Receiver is a perfect start to an AR build intended for flat-shooting, long-range accuracy. Chambered in 22 ARC, this upper receiver features an 18-inch 416R stainless steel with button rifling and 1/2x28" threads. The handguard is free-floating and skeletonized to reduce weight, and features a 12 o'clock picatinny rail for optics and ample M-LOK slots for accessories and four threaded sling swivel QD inserts. Other features include a premium BCG with a 9310 bolt individually MPI tested, staked gas key, and a durable black nitride finish. The Watchman XR Upper Receiver is rounded out with a RISE ambidextrous charging handle for right- or left-handed operation and improved ease of use with optics and gloves. Features Watchman XR Upper Receiver: Barrel: 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 RISE Armament Watchman XR .22ARC 18" Bbl Black Complete Upper RA-22ARC-CU-BLK-18