The Radian Model 1 Complete Upper Receiver represents precision engineering with a 14.5" pinned barrel chambered in 6mm ARC and finished in durable FDE Cerakote. Built with the highest quality materials and CNC machining this upper delivers exceptional performance with fully ambidextrous controls.Radian Model 1 Complete Upper ReceiverSub-MOA Accuracy Guarantee with Black Hills Match Grade AmmunitionBillet machined 7075-T6 upper receiver with M4 feed ramps6mm ARC chambering with 1:7 twist rate14.5" pinned barrel (16" overall length) with 5/8x24 thread pitchProprietary extended aluminum handguard with Magpul M-LOK systemEnhanced Black Nitride M16 Bolt Carrier GroupRadian Raptor-SD suppressor-optimized ambidextrous charging handleDirect impingement gas system with lightweight forward assistHand-assembled by trained gunsmiths and backed by Radian's lifetime guarantee this upper receiver seamlessly blends form and function for both left and right-handed shooters seeking premium performance and reliability.