The Radian Model 1 Complete Upper Receiver represents precision engineering at its finest featuring an 18" barrel chambered in 6mm ARC with gray Cerakote finish. Built with the highest quality materials and CNC machining this complete upper assembly delivers sub-MOA accuracy guarantee with Black Hills Match Grade ammunition.Radian Model 1 Complete Upper Receiver - AR-15 Platform18" barrel chambered in 6mm ARC with 1:7 twist rateBillet machined 7075-T6 upper receiver with M4 feed rampsGray Cerakote finish for durability and corrosion resistanceProprietary extended aluminum handguard with M-LOK modular mounting systemEnhanced Black Nitride M16 bolt carrier group includedRadian Raptor-SD suppressor-optimized ambidextrous charging handle5/8x24 thread pitch for muzzle device compatibilityLifetime guarantee and hand-assembled by trained gunsmithsDesigned for both left and right-handed shooters with fully ambidextrous controls this premium upper receiver delivers exceptional accuracy and reliability for competitive shooting hunting and tactical applications.