Cobalt Kinetics CK-Pro Stripped Upper Features The Cobalt Kinetics CK-Pro upper is machined from aluminum giving it the strength and dimensional consistency needed for repeatable accuracy on an AR-15 pattern rifle. The 15.5 receiver length fits standard AR-15 lowers letting builders pair it with their platform of choice without special fitting. Cobalt Kinetics built its reputation on precision machining for competitive shooters and that same attention to tolerance carries through to this upper. A flat-top Picatinny rail runs the length of the upper keeping it ready for optics mounting right out of the box. The CK Green anodized finish sets this upper apart visually from standard black builds appealing to shooters who want their rifle to stand out at the range or in competition. Durable anodizing protects the aluminum receiver from wear and corrosion through repeated use and cleaning. Pairing this upper with a matching lower or building a full custom rifle around it gives shooters a cohesive high-end result. The Cobalt Kinetics CK-Pro complete upper is for sale at GrabAGun for AR-15 builders seeking a premium aluminum upper with a distinctive finish. Cobalt Kinetics CK-Pro Stripped Upper Specifications Manufacturer: Cobalt Kinetics Model: CK-Pro Stripped Upper Type: Complete Upper Receiver Material: Aluminum Receiver Finish: CK Green Compatible Hosts: AR-15 Handguard Length: 15.5 Available At: GrabAGun