The RISE 6mm ARC AR-15 Upper Receiver is built for precision and performance, featuring an 18 inches 416R stainless steel threaded barrel renowned for its exceptional accuracy. This high-quality barrel is engineered to provide consistent, tight groupings and dependable performance, making it the ideal choice for both competitive shooting and tactical applications. Crafted from durable 416R stainless steel, the barrel offers superior resistance to wear and corrosion, ensuring long-lasting durability in any shooting condition. With its precision engineering and reliable design, the RISE 6mm ARC Upper Receiver elevates your AR-15 platform, delivering the performance and accuracy required for serious shooters. The 18 inches 416R stainless steel barrel is button rifled, air-gauged and tested for superior precision, with a threaded muzzle for attachment options The free-floating skeletonized aluminum handguard features a continuous 12 o'clock picatinny rail, M-LOK slots, (4) threaded steel sling swivel QD inserts, a snag-free front and a patent-pending attachment lock to maintain zero The RISE ambidextrous charging handle enhances ease of use for both right and left handed users, even with optics and gloves The premium Bolt Carrier Group features a 9310 bolt, individually MPI tested, a staked gas key and a durable black nitride finish for enhanced reliability Receiver forged billet aluminum, offering strength, durability and precision machining for a solid firearm receiver The product is backed by RISE's lifetime warranty and more-bang-for-your-buck guarantee, ensuring long term value and satisfaction