The CMMG Dissent Mk4 in 6mm ARC (brand part no. 60AA90CMB) packs the long-range performance of .243 or .308 Win without the weight of a larger AR-10/LR-308 rifle, built around a 16.1-inch barrel with a 1:7.5-inch twist and compatible with AR15-pattern controls. CMMG finishes the rifle in Midnight Bronze and fits the DISSENT side-folding stock with an adjustable length of pull and cheek riser, along with a forward non-reciprocating charging handle for quick manipulation without breaking the sight picture. The M-LOK handguard carries a top Picatinny rail, and an adjustable gas block lets shooters dial in cycling for suppressed or unsuppressed use, running a 60/90-degree CMMG ZEROED safety selector and feeding from a 10-round magazine. Among AR-platform rifles in the AR rifles category, the Dissent Mk4 favors long-range shooters who want flat-shooting 6mm ARC-class performance in a distinctive Midnight Bronze finish.

Key Specifications

• Chambered in 6mm ARC with a 1:7.5-inch rate of twist.
• Compatible with AR15-pattern controls and manual of arms.
• Features a 16.1-inch barrel.
• Finished in Midnight Bronze.
• Fitted with a DISSENT side-folding stock, adjustable length of pull and cheek riser.
• Includes a forward non-reciprocating charging handle.
• Wrapped in an M-LOK handguard with a top Picatinny rail.
• Runs an adjustable gas block, tunable for suppressed or unsuppressed use.
• Uses a 60/90-degree CMMG ZEROED safety selector.
• Feeds from a 10-round magazine.

Frequently Asked Questions

Why choose 6mm ARC over .308? It delivers similar long-range performance without the weight and bulk of a larger AR-10-pattern rifle.

Does the stock fold? Yes, the DISSENT side-folding stock adjusts for length of pull and cheek height.

Buy the CMMG Dissent Mk4 6mm ARC Midnight Bronze

Flat-shooting long-range performance in a distinctive Midnight Bronze finish is exactly what the Dissent Mk4 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.