The Rise .22 ARC AR-15 upper receivers are equipped with a highly precise 18 inches barrel constructed from 416R stainless steel, featuring threading for enhanced compatibility. The Rise ambidextrous charging handle is designed for both right- and left-handed users, enhancing operational efficiency when using optics and gloves This premium Bolt carrier group (BCG) features a 9310 steel bolt that has undergone individual magnetic particle inspection (MPI) testing, it includes a staked gas key and is finished with a durable black nitride coating Material Composition of receiver - precision-machined forged billet aluminum Supported by Rise's lifetime warranty and value assurance guarantee Barrel specifications - 18 inches length, constructed from 416R stainless steel, featuring button rifling The barrel undergoes air gauging and testing procedures and is equipped with threading The handguard is constructed from free-floating skeletonized aluminum and features a continuous picatinny rail at the 12 o'clock position It includes M-LOK slots and four threaded steel sling swivel quick detach (QD) inserts The design incorporates a snag-free front and a patent-pending attachment lock to ensure zero retention