CMMG Resolute MK3 8.6 Blackout 16.1 inch Upper Receiver CMM
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CMMG
Overview
The CMMG Resolute Mk3 8.6 Blackout Upper Receiver is a complete assembly designed for shooters looking to utilize the 8.6 Blackout caliber, offering a 16.1-inch barrel that balances maneuverability and ballistic performance. This upper receiver is finished in black, providing a sleek and tactical appearance while ensuring compatibility with a variety of lower receivers for custom builds. It is commonly found in builds aimed at maximizing the unique capabilities of the 8.6 Blackout round, making it a solid choice for both hunting and tactical applications.
Specifications
CMMG Resolute MK3 8.6 Blackout 16.1 inch Upper Receiver CMM
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG Resolute MK3 8.6 Blackout 16.1 inch Upper Receiver CMM to a build in May 2026.
Today the one retailer we track is out of stock. Listed prices start at $499.99 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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