CMMG MK4/AR15 Upper Receiver Assembly Midnight Bronze
All CMMG upper receivers3 options
- Coyote · Tanfrom $139.99, in stock
- Midnight · Bronze, this page
- Tungstenout of stock
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CMMG
Overview
The CMMG Mk4 AR-15 Upper Receiver Assembly in Midnight Bronze comes as a stripped assembly, allowing builders to customize it with their choice of components. This upper receiver is designed specifically for the AR-15 platform, providing a solid foundation for various configurations and setups. Builders often incorporate this stylish bronze finish into custom builds aiming for a unique aesthetic.
Specifications
CMMG MK4/AR15 Upper Receiver Assembly Midnight Bronze
3 options
- Coyote · Tanfrom $139.99, in stock
- Midnight · Bronze, this page
- Tungstenout of stock
Available Merchants(1)
Prices checked
Price Alert
October 2026 on GunPartPicker
CMMG MK4/AR15 Upper Receiver Assembly Midnight Bronze ranked #170 of the 844 upper receivers builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #189 of the 2,005 upper receivers builders have added. Builds with this upper receiver are mostly chambered in 5.56 NATO (60%, then .223 Wylde 20%), split between carbine-length (50%) and mid-length (33%) gas systems, and nearly all AR-15.
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 $143.99, with no real sale all month. Buying today, the lowest price is $144.79 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
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Frequently Built With
The part most often added in each category by the builds that include this one
Aero Precision M4E1 Stripped AR-15 Lower Receiver - FDE Cerakote
Mdt Vertical Grip Premier - AR Compatible - FDE
Breek Arms AR-15 Warhammer MOD2 Ambidextrous Charging Handle Black
Ballistic Advantage Premium Series 16" 223 Wylde Tactical Government Contour 1:8 Stainless AR-15 Barrel - Mid-Length - 1/2x28
FAXON Firearms 5.56 M16 Bolt Carrier Group Nitride Chameleon PVD
Strike Industries Enhanced AR-15 Low Profile Gas Block - .750"
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.
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