CMMG | DISSENT MK4 | 6.5 Grendel | 16.1in

The CMMG DISSENT Mk4 in 6.5 Grendel brings extended-range capability to the AR-15 platform with a 16.1-inch barrel and a host of ZEROED components. Its configuration suits medium-range target work and precision varmint/hunting applications where the 6.5 Grendel delivers .308-like ballistics from an AR-pattern package. For optics, a variable low-power tactical scope such as the Vortex Viper PST Gen II 1-6×24 pairs well and stays under $1,000 while providing low-end close-quarters usability and usable magnification for longer shots.

Product Specifications

• The caliber is 6.5 Grendel.
• The platform is Mk4.
• The operating system is Direct Impingement.
• The barrel length is 16.1 inches.
• The barrel twist is 1:8.
• The barrel material is 416SS SBN.
• The muzzle device is a CMMG ZEROED Muzzle Brake.
• The muzzle thread pattern is 5/8 x 24.
• The gas port location is set for Rifle.
• The gas block is Adjustable 0.750.
• The upper receiver is DISSENT 7075 T6 Aluminum.
• The lower receiver is Mk4 Forged 7075 T6 Aluminum.
• The hand guard is a CMMG 15 Proprietary design.
• The included magazines are CMMG 10rd (2).
• The listed UPC is 810148622244.

The DISSENT Mk4 presents a competent extended-range AR-pattern option that combines a stout 16.1-inch stainless barrel with CMMG’s ZEROED parts package for consistent handling and ergonomics. Its adjustable gas block and robust forged receivers make it suitable for shooters who want an AR-style platform optimized for 6.5 Grendel performance, whether for precision target work or medium-range hunting applications. The configuration emphasizes modularity and a familiar AR manual of arms while delivering cartridge performance that extends the effective reach of standard AR-15 platforms.