The CMMG Dissent BR4 (CMMG part no. 64A190CAB) is a 6.5 Grendel AR-15 built around a side-charging upper for a lower-profile optic mounting solution. CMMG pairs a 16.1-inch medium-taper barrel in 4140 chrome moly steel, salt-bath nitride coated, with a car-length .750-inch gas system for reliable cycling. A CMMG Zeroed drop-in trigger and Zeroed muzzle brake add precision and control, while the CMMG EML15 M-Lok handguard keeps the rail system light. A Magpul SGA stock, styled after the Remington 870 shotgun stock, and ambidextrous controls round out a rifle built for shooters who want 6.5 Grendel’s flatter trajectory and heavier bullet options from a compact carbine.

Key Specifications

• Chambered in 6.5mm Grendel.
• Barrel length is 16.1 inches, medium-taper contour, in 4140 chrome moly steel.
• The barrel wears a salt-bath nitride coating.
• Rate of twist is 1:7 inches.
• The charging handle is a side-charging (Dissent) design.
• The handguard is the CMMG EML15 M-Lok design.
• The trigger is a CMMG Zeroed drop-in trigger.
• The muzzle is threaded 5/8-24, fitted with a CMMG Zeroed muzzle brake.
• The stock is a Magpul SGA stock, styled after the Remington 870 shotgun stock.
• Magazine capacity is 10 rounds.

Frequently Asked Questions

What is unique about the Dissent charging handle? It is a side-charging design rather than a standard rear charging handle.

What stock does this rifle use? A Magpul SGA stock, styled after the Remington 870 shotgun stock.

What is the magazine capacity? 10 rounds.

Buy the CMMG Dissent BR4 6.5 Grendel Rifle, 16.1-inch, Magpul SGA Stock

This Dissent BR4 is a distinctive pick from our AR rifles lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.