The Radian Model 1 Complete Upper Receiver represents precision engineering with 6mm ARC chambering and a 14.5" barrel (pinned to 16" OAL) in Brown Cerakote finish. Hand-assembled by trained gunsmiths with a Sub-MOA accuracy guarantee using Black Hills Match Grade ammunition.Radian Model 1 Complete Upper Receiver for AR-156mm ARC caliber with 1:7 twist rate barrel14.5" barrel length pinned to 16" overall lengthBillet machined 7075-T6 upper receiver with M4 feed rampsBrown Cerakote finish for durability and aestheticsM-LOK compatible extended aluminum handguardEnhanced Black Nitride M16 bolt carrier groupRadian Raptor-SD suppressor-optimized ambidextrous charging handle5/8x24 thread pitch muzzleLifetime guarantee from RadianDesigned for precision shooters demanding sub-MOA performance this complete upper features fully ambidextrous controls and premium components throughout. Perfect for competitive shooting hunting or tactical applications where accuracy and reliability are paramount.