The CMMG Upper Receiver Assembly for Mk4/AR15 in Armor Black is a machined upper receiver intended for compatible AR15 platform builds. It is constructed from aircraft-grade aluminum and ships with CMMG’s ZEROED Polymer Dust Cover pre-installed. The design omits the forward assist to provide a streamlined profile for custom builds and replacements.
Key Specifications
- Manufacturer: CMMG.
- Model: Upper Receiver Assembly for Mk4/AR15.
- Material: Aircraft-grade aluminum.
- Finish: Armor Black.
- Dust cover: ZEROED Polymer Dust Cover (pre-installed).
- Forward assist: Omitted.
- Intended platform: Mk4/AR15.
- UPC: 810097506329.
This upper provides a durable, low-profile foundation for a range of AR15 builds. Its aircraft-grade construction and pre-installed polymer dust cover simplify installation for builders seeking a reliable, streamlined receiver component.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.




