Cobalt Kinetics CK-Pro Complete Upper Features The Cobalt Kinetics CK-Pro Receiver Set is engineered around a proprietary non rotating upper receiver design a feature meant to eliminate the play and flex that can develop between the upper and lower receivers over time. Eight TORX screws secure the handguard to the upper creating a rock solid mounting platform that resists loosening under recoil and heavy accessory loads such as lights lasers or bipods. The aluminum construction keeps the overall receiver set light while maintaining the strength needed for a durable long lasting build. A hardcoat anodized finish in Flat Dark Earth protects the aluminum from wear and corrosion while giving the rifle a distinctive premium appearance. This complete set includes the upper receiver lower receiver M-LOK handguard and all hardware needed for assembly streamlining the build process for anyone assembling a custom AR rifle. Because the set is designed as a matched pair builders avoid the fitment inconsistencies that can arise when mixing receivers from different manufacturers. At 2.4 pounds the receiver set keeps the rifle s overall weight in check while still delivering the rigidity expected from a premium upgrade kit. For builders who want a precision machined tightly fitted foundation for their next AR project the Cobalt Kinetics CK-Pro Receiver Set delivers a dependable starting point. Cobalt Kinetics CK-Pro Complete Upper Specifications Manufacturer: Cobalt Kinetics Model: CK-Pro Receiver Set Type: Receiver Set Caliber: Multi-Cal Color: Flat Dark Earth Receiver Material: Aluminum Receiver Finish: Hardcoat Anodized Handguard: M-LOK Weight: 2.4 lbs Available At: GrabAGun