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CMMG
Overview
The CMMG Mk4 Upper Receiver Assembly is a stripped upper designed for the AR-15 platform, allowing builders to customize their rifles from the ground up. Its flat dark earth (FDE) color gives a tactical aesthetic while also providing a durable finish that can withstand the rigors of use. This upper receiver is commonly utilized in builds that prioritize a lightweight yet robust setup, making it ideal for those looking to create versatile and functional AR-15 configurations.
CMMG MK4/AR15 Upper Receiver Assembly Coyote Tan
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Prices checked
CMMG MK4/AR15 Upper Receiver Assembly Coyote Tan ranked #170 of the 844 upper receivers builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker since June 2026. Since April 2026, it ranks #269 of the 2,005 upper receivers builders have added.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $139.99, with no real sale all month. Buying today, the lowest price is $139.99 at Optics Planet, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 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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