CMMG Dissent MK4 Upper Group 5.56x45mm 10.5in

The CMMG Dissent MK4 upper group is a compact AR-platform upper configured around a 10.5-inch barrel and delivered in Armor Black finish. This upper includes a left-side non-reciprocating charging handle, a 9.6-inch M-LOK handguard, and a CMMG ZEROED blast compensator. It is supplied as an upper group only and is intended for builders and users configuring compact pistol-style or short-barrel AR platforms; using a pistol upper with a stock or certain stabilizing braces may be subject to NFA rules.

Key Specifications

• The caliber is 5.56x45mm NATO.
• The barrel length is 10.5 inches.
• The barrel twist rate is 1:7.
• The barrel material is 4140CM with SBN finish.
• The muzzle device is the CMMG ZEROED blast compensator.
• The muzzle is threaded 1/2 x 28.
• The gas block is an adjustable .750" unit.
• The upper receiver is DISSENT 7075 T6 aluminum.
• The handguard is a 9.6-inch proprietary M-LOK design.
• The charging handle is a left-side DISSENT side charger.

Engineered for compact AR-platform applications, the Dissent MK4 upper merges a short overall length with features intended for tunability and use in suppressed or suppressed-capable setups via its adjustable gas block. The robust materials and Cerakote finish provide practical durability for range use and field transport.