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CMMG
Overview
The CMMG Upper Receiver Assembly Mk3 is a stripped upper designed specifically for the .308 Win caliber, making it an ideal choice for builders looking to create a robust AR-10 platform. With its coyote tan finish, this upper not only provides functionality but also adds a tactical aesthetic to your build. This assembly is commonly used in builds that prioritize the .308 Win caliber, allowing for a range of applications from precision shooting to tactical use.
CMMG Upper Receiver Assembly MK3/.308WIN Coyote Tan Coyote Tan
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Builders on GunPartPicker first added the CMMG Upper Receiver Assembly MK3/.308WIN Coyote Tan Coyote Tan to a build in February 2026.
Today the one retailer we track is out of stock. Listed prices start at $279.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
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