CMMG MK4/AR-15 Upper Receiver Assembly with Forward Assist – Black

Upgrade or complete your AR-15 build with the CMMG MK4/AR-15 Upper Receiver Assembly with Forward Assist in black. Manufactured by CMMG, one of the most trusted names in the AR-15 platform, this upper receiver assembly is built to the exacting standards that competitive shooters, hunters, and serious firearms enthusiasts demand. Designed for compatibility with standard MK4 and AR-15 components, this assembly provides a solid foundation for your custom build or replacement project.

CMMG is renowned for their precision machining, consistent quality control, and American craftsmanship. This upper receiver assembly features a forward assist for positive bolt closure and is finished in a durable matte black, making it a reliable and versatile component for a wide range of AR-15 configurations.

Whether you’re building your first AR-15 from the ground up, replacing a worn component, or piecing together a custom rifle, the CMMG MK4 upper receiver assembly delivers the quality and reliability you can count on. At Deep Roots Rifle Co, we stock a strong selection of AR-15 components and accessories to support your build from start to finish. Our knowledgeable staff in Eustis, Florida is ready to help you find the right parts for your specific needs.

Order online today and take advantage of our fast shipping, or stop by our Eustis, Florida gun store to speak with one of our firearms specialists in person.