CMMG DISSENT Mk4 SBR | 5.56x45mm | 10.5″

The CMMG DISSENT Mk4 is a compact short-barreled rifle (SBR) built around CMMG’s Compact Action direct-impingement system, offering an AR-style experience without a traditional buffer tube. This 5.56x45mm, 10.5″ configuration is finished in Armor Black and ships with two 30-round magazines. For a practical optic that stays well under $1,000, consider the Vortex Strike Eagle 1-6×24 for fast target acquisition and low-light versatility. Typical uses include close-quarters training and carbine competition shooting.

Product Specifications

• The caliber is 5.56x45mm.
• The barrel measures 10.5″.
• The operating system is Compact Action-Direct Impingement.
• The barrel twist is 1:7.
• The muzzle device is a CMMG ZEROED Linear Compensator.
• The muzzle thread is 1/2 x 28.
• The gas block is Adjustable 0.750″.
• The upper receiver is DISSENT 7075 T6 Aluminum.
• The lower receiver is Mk4 Forged 7075 T6 Aluminum.
• The hand guard is a CMMG 9.6″ Proprietary.
• The finish is Cerakote.
• The charging handle is a Dissent Side Charger – Reversible.
• The stock/brace is a B5 Systems Modular Platform Stock.
• The package includes (2) CMMG 30rd magazines.
• The UPC is 810144720494.

Compact, well-appointed, and purpose-built, the DISSENT Mk4 delivers an AR-pattern experience in a substantially shorter package while retaining familiar controls and accessory mounting. The adjustable gas block and reversible side charger make it adaptable to suppressed use and ambidextrous handling preferences without changing the rifle’s core function. If you need a compact carbine for range work and competition that maintains modularity and serviceability, this configuration is a purposeful option.

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