Cobalt Kinetics(R) CK-Pro Receiver Set is a precision-machined AR-15 receiver assembly featuring an 11.8 in S.I.M.S. handguard and Black Cerakote finish. Constructed from 7075-T6 billet aluminum the set includes matching upper and lower receivers with a proprietary handguard mounting interface. The coordinated design provides a foundation for compatible AR-15 rifle builds.Key FeaturesMatched AR-15 upper and lower receiver set11.8 in S.I.M.S. handguard with M-LOK mounting slots7075-T6 billet aluminum receiver constructionBlack Cerakote finishSelf-indexing handguard mounting systemIncludes barrel jam nut and handguard mounting hardwareCompatible with mil-spec AR-15 componentsSerialized lower receiver requires FFL transferCobalt Kinetics(R) develops precision-engineered firearms and components for modern sporting rifle platforms. The company emphasizes innovative receiver designs advanced machining techniques and carefully controlled manufacturing standards. Cobalt Kinetics produces products focused on structural integrity dependable functionality and refined firearm engineering.