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CMMG

CMMG Resolute MK3 8.6 Blackout 16.1 inch Upper Receiver 1-3 Twist 5/8 X 24 CMMG ZEROED Muzzle Brake Cerakote Coyote Tan

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CMMG CMMG Resolute MK3 8.6 Blackout 16.1 inch Upper Receiver 1-3 Twist 5/8 X 24 CMMG ZEROED Muzzle Brake Cerakote Coyote Tan - view 1
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CMMG

Overview

The CMMG Resolute Mk3 Upper Receiver is a complete assembly designed for the 8.6 Blackout caliber, featuring a 16.1-inch barrel that strikes a balance between maneuverability and ballistic performance. With a thread pitch of 5/8x24, it allows for the attachment of various muzzle devices, enhancing versatility for different shooting applications. This upper receiver is commonly found in builds aimed at optimizing performance for suppressed shooting and tactical use.

Specifications

MPN33BFA0CCT
AssemblyComplete
ColorBlack
Barrel Length16.1
PlatformAR-15
Caliber8.6 Blackout
Thread Pitch5/8x24

Available Merchants(1)

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Optics Planet
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$1,000
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August 2026 on GunPartPicker

CMMG Resolute MK3 8.6 Blackout 16.1 inch Upper Receiver 1-3 Twist 5/8 X 24 CMMG ZEROED Muzzle Brake Cerakote Coyote Tan ranked #291 of the 690 upper receivers builders added on GunPartPicker in August 2026.

It was out of stock everywhere we track for all of August 2026, and today the one retailer we track is out of stock. Listed prices start at $999.99 at Optics Planet for when it comes back.

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