The CMMG Banshee MK4 is a compact, AR-platform 9mm pistol built on the Mk4 lower. It features a fixed-ejector radial delayed blowback operating system and a 5-inch threaded barrel designed for a compact footprint. The pistol ships with CMMG’s EML4 M-LOK handguard, RipBrace, and a CMMG 9ARC magazine for range-ready usability.
Key Specifications
- Caliber is 9mm Luger.
- The operating system is Fixed Ejector Radial Delayed Blowback.
- The barrel length is 5 inches.
- The barrel twist is 1:10.
- The barrel material is 4140CM SBN.
- The muzzle device is CMMG ZEROED Linear Comp and the muzzle thread is 1/2 x 28.
- The handguard is CMMG EML4 M-LOK.
- The stock/brace is a CMMG RipBrace.
- Includes one 30-round CMMG 9ARC magazine.
- The overall length is 20.8 inches.
Built on the practical Mk4 AR platform, this Banshee MK4 offers a compact configuration that suits close-quarters and general-purpose shooting where a small footprint and AR-style controls are desired. Its M-LOK handguard and threaded barrel provide mounting and accessory options while CMMG components deliver a cohesive equipment package. The Banshee MK4 is an option for shooters seeking a compact, modern 9mm AR-platform pistol with factory-configured components and a high-capacity magazine.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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