CMMG Upper Receiver Assembly MK4/AR15 Forward Assist Coyote Tan
3 options
- Coyote · Tan, this page
- Midnight · Bronzeout of stock
- Tungstenout of stock
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CMMG
Overview
The CMMG Upper Receiver Assembly Mk4 is a stripped upper designed for the AR-15 platform, featuring a coyote tan finish that adds a touch of style while maintaining functionality. This assembly allows builders to customize their rifle from the ground up, accommodating various components according to their specific needs. Commonly found in builds with a pistol gas system and chambered for 300 Blackout, this upper receiver is ideal for those looking to create a compact and versatile firearm.
Specifications
CMMG Upper Receiver Assembly MK4/AR15 Forward Assist Coyote Tan
3 options
- Coyote · Tan, this page
- Midnight · Bronzeout of stock
- Tungstenout of stock
Build history on GunPartPicker
Builders have been adding the CMMG Upper Receiver Assembly MK4/AR15 Forward Assist Coyote Tan to their builds on GunPartPicker since March 2026. All time, it ranks #224 of the 1,636 upper receivers builders have added. Builds with this upper receiver are mostly chambered in 300 Blackout (75%, then 5.56 NATO 25%), mostly on pistol-length gas (75%, then carbine-length 25%), and nearly all AR-15.
It was hard to find in August 2026, in stock on only 5 of the 10 days we checked, and today the one retailer we track is out of stock. The best price drifted down from $129.99 to $123.99 over August 2026 without a real sale. Listed prices start at $127.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 11 builds that include this one
Griffin Armament MK2 AR-15 Ambidextrous Stripped Lower Receiver Flat Dark Earth
Griffin Armament .300 Blackout Hedp AR-15 Barrel - 9.5"
Triggertech AR Diamond Trigger Flat Black
Geissele Automatics MK14 Super Modular Rail Handguard 9.3" M-LOK Ddc
KAK AR15 BCG M16 556 K-SPEC NP3 DE DOWNVENT BOLT C...
Geissele Automatics AR-15/M16 Super Charging Handle, Ddc
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 1 →Builds in the community that include the CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Coyote Tan
| Build | Parts | Total |
|---|---|---|
 | 25 | $1045.81 |
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