CMMG DISSENT MK4 .300 BLK 14.5″ Pinned & Welded

The CMMG DISSENT MK4 .300 BLK is an AR-style pistol platform built for compact handling and adaptable performance. It is intended for range use, short- to mid-range applications, and setups that may incorporate a suppressor or folding stock.

The DISSENT MK4 pairs a 14.5" barrel with a pinned-and-welded ZEROED SVD brake to provide an effective compact package while producing a legal overall length of 16.1" when configured with the brake. The platform uses CMMG's Compact Action, replacing a traditional buffer system with a 1913 Picatinny rail end plate to support accessories such as slings, folding stocks, and pistol braces.

Key Specifications

• The caliber is .300 BLK.
• The barrel length is 14.5 inches (pinned & welded), producing a legal length of 16.1 inches with the ZEROED SVD Brake.
• The operating system is Direct Impingement.
• The barrel material is 4140CM SBN.
• The barrel twist is 1:7.
• The muzzle device is a CMMG ZEROED SVD Brake (pinned & welded).
• The muzzle thread is 5/8 x 24.
• The upper receiver is DISSENT 7075 T6 Aluminum.
• The lower receiver is Mk4 Forged 7075 T6 Aluminum.
• The magazine configuration is Magpul 300BLK 30rd PMAG (2).

The DISSENT includes a reversible side charger and a patent-pending Compact Action that removes the AR buffer system while maintaining familiar AR-15 ergonomics. The adjustable gas block lets shooters tune the gas system for different loadings, making the platform adaptable for both supersonic and subsonic .300 BLK ammunition.

With CMMG components such as the proprietary 13.5" handguard, ZEROED pistol grip, and ZEROED drop-in trigger, the DISSENT MK4 provides a durable, configurable pistol platform. The Cerakote finish options and modular design allow for tailored setup without altering the core performance.

Buy the CMMG DISSENT MK4 .300 BLK online today for a compact, configurable AR-style pistol that supports suppressed and short-barrel configurations while retaining full AR manual-of-arms familiarity.