Start your AR10 upper build with looks and quality like no other. The CMMG Mk3 upper receiver assembly, based on the DPMS LR-308 gen1 high-pattern design, gives shooters an AR10-style platform with the widest range of compatible parts and accessories on the market. Each receiver comes with a CMMG ZEROED Mk3 Polymer Dust Cover pre-installed. FeaturesBillet 7075 T6 AluminumCerakote Finish