CMMG Banshee MK4 5.56 AR Pistol: Precision Compact Utility
The CMMG Banshee MK4 5.56 AR Pistol is engineered for professionals and serious enthusiasts who require a compact, reliable, and high-performance firearm. Built on the proven AR-15 platform, this MK4 variant is chambered in 5.56x45mm NATO, providing robust terminal performance from a highly maneuverable package. The 10.5-inch barrel configuration, coupled with CMMG’s commitment to quality manufacturing, ensures consistent cycling and effective ballistic characteristics for close-quarters applications and rapid deployment scenarios.
Key Features
Optimized Compact Form Factor
The 10.5-inch 4140 Chrome Moly Vanadium steel barrel provides a critical balance between overall length and muzzle velocity retention for the 5.56 NATO cartridge. This barrel length significantly enhances maneuverability in confined spaces, making it suitable for vehicle operations, home defense, or as a compact sporting platform. The barrel features a Salt Bath Nitride (SBN) finish for superior corrosion resistance and enhanced service life.
Robust Direct Impingement System
Utilizing a carbine-length direct impingement gas system, the Banshee MK4 5.56 maintains the reliability and familiarity of the standard AR-15 architecture. This system is proven for consistent operation and ease of maintenance, ensuring dependable performance under demanding conditions. The gas port is precisely sized to optimize cycling with a broad range of 5.56 NATO and .223 Remington ammunition.
Precision Machined Receivers
Both the upper and lower receivers are precision machined from 7075-T6 billet aluminum, providing a rigid and durable foundation for the firearm. The billet construction enhances structural integrity compared to forged counterparts, ensuring a consistent interface between components. Finished with a durable Cerakote Armor Black coating, these receivers offer advanced protection against abrasion, corrosion, and chemical exposure.
Integrated Ergonomics and Control
The Banshee MK4 integrates a CMMG RML7 M-LOK handguard, offering versatile accessory attachment points for lights, lasers, and grips without adding unnecessary bulk. The firearm is equipped with a CMMG RipBrace, providing a compact, rapidly deployable, and adjustable brace solution that enhances stability and control. A CMMG ZEROED pistol grip and mil-spec single-stage trigger complete the control interface, delivering predictable manipulation and a consistent pull.
Technical Specifications
Platform
- Caliber: 5.56x45mm NATO
- System: Direct Impingement, Carbine Length Gas
- Receiver: CMMG Mk4 Forged 7075-T6 Billet Aluminum, Cerakote Armor Black
Barrel
- Length: 10.5 inches
- Material: 4140 Chrome Moly Vanadium Steel
- Finish: Salt Bath Nitride (SBN)
- Twist Rate: 1:7 RH
- Muzzle Device: A2 Flash Hider
- Gas Block: Low Profile, Fixed
Components
- Handguard: CMMG RML7 M-LOK, 7-inch
- Pistol Brace: CMMG RipBrace, 6-Position
- Grip: CMMG ZEROED Pistol Grip
- Trigger: CMMG Mil-Spec Single Stage
- Magazine: (1) 30-round Magpul PMAG
Dimensions
- Weight: 5.5 lbs (unloaded)
- Overall Length: 24.5 inches (collapsed) / 27.2 inches (extended)









