CMMG Banshee MK4 9mm 5″ M-LOK RipBrace Pistol 30rd

The CMMG Banshee MK4 is a compact 9mm AR-pattern pistol built on the Mk4 platform. It uses CMMG’s radial delayed blowback fixed ejector system and accepts CMMG 9mm conversion magazines for familiar AR-style manual of arms. The firearm features an EML4 M-LOK handguard, a RipBrace pistol brace, ambidextrous controls, and a 5″ threaded barrel suited for short-range and close-quarters applications. A 30-round 9ARC magazine is included for extended capacity where permitted.

Key Specifications

• This model is built on the Mk4 AR15-pattern platform for familiar ergonomics and controls.
• The chambering is 9mm (9mm Luger) as specified by the manufacturer.
• The operating system is Fixed Ejector Radial Delayed Blowback.
• The barrel measures 5 inches and is threaded 1/2 x 28 for muzzle device options.
• The barrel material is listed as 4140CM SBN with a 1:10 twist rate.
• The handguard is a CMMG EML4 M-LOK with full-length M-LOK slots on both sides and the bottom.
• The upper receiver is billet 6061 T6 aluminum and the lower is Mk4 forged 7075 T6 aluminum.
• The included magazine is a CMMG 9ARC 30-round magazine for 9mm feed systems.
• The finish is specified as Cerakote Standard in armor black.
• The overall length is listed as 20.8 inches.

Compact and purpose-built, the Banshee MK4 delivers AR-pattern familiarity in a short-package 9mm pistol. Its Mk4 construction, M-LOK handguard and threaded 5″ barrel provide a versatile foundation for short-range use, while ambidextrous controls and a high-capacity 30-round magazine support sustained operation where legal. The combination of robust receiver materials and a Cerakote finish offers durable function and a practical, low-profile appearance for owners seeking a dependable compact 9mm AR pistol platform.

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