CMMG Resolute MK4 6.5 Grendel Complete Upper 16.1"

CMMG Resolute MK4 Complete Upper Receiver

The CMMG Resolute MK4 represents a thoughtful approach to modern rifle design. This complete upper receiver assembly arrives ready to function—simply mate it to your AR-15 lower receiver and you have a working rifle.

Specifications

• Caliber: 6.5 Grendel
• Barrel Length: 16.1 inches
• Configuration: Complete upper receiver assembly
• Manufacturer: CMMG

Why 6.5 Grendel?

The 6.5 Grendel cartridge offers a compelling balance of power and efficiency. It delivers superior ballistics compared to 5.56 NATO while remaining manageable in recoil. This makes it an excellent choice for hunting medium game, long-range target shooting, and tactical applications where precision matters.

Key Features

• Complete Assembly: No gunsmithing required—everything you need is included
• Proven Design: CMMG's Resolute platform has earned respect among serious shooters
• Practical Barrel Length: The 16.1-inch barrel provides velocity and handling balance
• Quality Construction: Built to CMMG's exacting standards

Ideal For

This upper works well for hunters seeking a modern rifle platform, shooters interested in exploring the 6.5 Grendel cartridge, and those building or upgrading an AR-15 system. The complete assembly eliminates compatibility concerns and gets you shooting quickly.