RISE Armaments 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 oclock 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. Product Features Barrel: 18-inch 416R stainless steel, fluted, button-rifled, air-gauged and tested; threaded Handguard: 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 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 Product Specifications Caliber: .22ARC Rifle Barrel Length: 18" Rifle Barrel Twist: 1:7" Barrel Thread Pitch: 1/2x28" Iron Sights: No Caliber or Gauge: .22 ARC Product Type: Upper Receiver