CMMG Dissent MK4 Upper Group 5.56 NATO 10.5″ Left Charger

Description

The CMMG DISSENT MK4 upper group is a compact AR-platform upper built around CMMG’s DISSENT architecture. This assembly is configured for 5.56x45mm NATO and features a 10.5-inch barrel, a left-side non-reciprocating charging handle, and a 9.6-inch M-LOK handguard. The unit includes a 1913 Picatinny rail end plate intended to be used in place of a traditional buffer tube and is finished in Armor Black Cerakote.

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.
• The barrel contour is MT.
• The muzzle device is a CMMG ZEROED Blast Compensator.
• The muzzle thread is 1/2 x 28.
• The gas block is an adjustable .750″ unit located at the pistol gas port.
• The handguard is a 9.6-inch M-LOK proprietary CMMG design.
• The charging handle is a left-side non-reciprocating DISSENT side charger.
• The upper receiver is DISSENT 7075 T6 aluminum with a 1913 Picatinny rail end cap.

Built for users who want a compact, high‑quality upper assembly, the DISSENT MK4 offers a short overall length while retaining features that support tuning and accessory mounting. The adjustable gas block allows shooters to tailor gas flow for different loads or suppressor use, and the left-side charging handle provides alternative manipulation while maintaining a clean top rail for optics. Backed by CMMG’s lifetime quality guarantee against material and workmanship defects, this upper group pairs modern materials and a practical feature set in a compact package.

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