The LWRC REPR MKII 6.5 Creedmoor 22" 1:8" 5/8x24 Spiral Fluted Barrel FDE CA Compliant Complete Upper Receiver is a high-performance firearm component designed for precision and compliance. This complete upper receiver is chambered in 6.5 Creedmoor, known for its long-range accuracy and ballistic efficiency. The 22-inch spiral-fluted barrel with a 1:8 twist rate ensures optimal bullet stabilization, while the 5/8x24 threaded muzzle allows for easy attachment of muzzle devices. Finished in Flat Dark Earth , this upper receiver is California compliant, featuring a fixed magazine and other state-specific modifications. The LWRC REPR MKII upper receiver is built with a monoforge design, integrating the rail base for enhanced durability and rigidity. It also includes LWRC's patented short-stroke gas piston system, which offers superior reliability and reduced maintenance compared to traditional direct impingement systems. This upper receiver is perfect for shooters seeking a high-performance, compliant option for their AR-10 style lower receivers. LWRC REPR MKII 6.5 Creedmoor 22" 1:8" 5/8x24 Spiral Fluted Bbl FDE CA Compliant Complete Upper Receiver REPRMKIIU6.5CKF22SC