| Platform | Mk4 |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Finish | Cerakote Standard |
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Upper Receiver Assembly, Mk4/AR15
Expertly crafted from aircraft grade aluminum, CMMG® Mk4/AR15 upper receiver assemblies come with our ZEROED® Polymer Dust Cover pre-installed. Available in seven different Cerakote finishes, this upper receiver omits the forward assist for those looking for a sleek and stylish base to start a new AR15 build.
Lifetime Quality Guarantee
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.