CMMG Upper Receiver Assembly MK4/AR15 Forward Assist Midnight Bronze
3 options
- Coyote · Tanout of stock
- Midnight · Bronze, this page
- Tungstenout of stock
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CMMG
Overview
The CMMG Upper Receiver Assembly Mk4 is a stripped upper receiver designed specifically for AR-15 builds, offering a solid foundation for your custom project. The midnight bronze finish adds a unique aesthetic while maintaining compatibility with standard AR-15 components. This type of upper receiver is commonly found in builds that prioritize a distinctive look without compromising on functionality.
Specifications
CMMG Upper Receiver Assembly MK4/AR15 Forward Assist Midnight Bronze
3 options
- Coyote · Tanout of stock
- Midnight · Bronze, this page
- Tungstenout of stock
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG Upper Receiver Assembly MK4/AR15 Forward Assist Midnight Bronze to a build in April 2026.
It was hard to find in August 2026, in stock on only 4 of the 8 days we checked, and today the one retailer we track is out of stock. Prices barely moved in August 2026, holding around $129.99, so there haven't been real sales lately. Listed prices start at $129.99 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
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Builds Featuring This Part
See all 1 →Builds in the community that include the CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Midnight Bronze
| Build | Parts | Total |
|---|---|---|
 | 26 | $1607.09 |
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