CMMG Banshee MK57 5.7x28mm Pistol 8" Barrel 20rd M-LOK

The CMMG Banshee MK57 delivers the high-velocity performance of 5.7x28mm ammunition in a compact, precision-engineered platform. This pistol combines CMMG's proven manufacturing quality with the ballistic advantages of the 5.7x28mm cartridge for superior penetration and reduced recoil.

What Makes This Different

The Banshee MK57 utilizes CMMG's proprietary delayed blowback operating system specifically engineered for the 5.7x28mm cartridge. Unlike direct blowback systems that require heavy bolts, this design maintains lighter reciprocating mass for faster follow-up shots. The medium taper barrel profile balances rigidity with weight reduction, while the black nitride finish provides superior corrosion resistance compared to standard phosphate coatings.

Key Features

• 8-inch black nitride barrel with medium taper profile and threaded muzzle for suppressor compatibility
• EML 7-inch M-LOK handguard provides multiple attachment points for accessories
• Black Armor Cerakote aluminum receiver with integrated Picatinny rail
• 20-round magazine capacity maximizes firepower in compact package
• CMMG Zeroed grip enhances control and ergonomics
• Delayed blowback operating system optimized for 5.7x28mm ballistics
• Compatible with standard AR-15 triggers and safety selectors

The 5.7x28mm cartridge generates muzzle velocities exceeding 2,000 fps with minimal felt recoil, making rapid target transitions effortless. The combination of high velocity and low recoil proves advantageous for competitive shooting disciplines and defensive applications. Weather-sealed components and the nitride barrel finish ensure reliable function in adverse conditions, while the threaded barrel accepts standard 1/2x28 muzzle devices.

Technical Specs

• Caliber: 5.7x28mm
• Barrel Length: 8 inches with medium taper profile
• Barrel Finish: Black nitride with threaded muzzle
• Handguard: EML 7-inch M-LOK compatible
• Receiver: Aluminum with Black Armor Cerakote finish
• Magazine Capacity: 20 rounds
• Operating System: Delayed blowback
• Rail System: Full-length Picatinny top rail
• Grip: CMMG Zeroed design
• Country of Origin: United States

This platform represents CMMG's commitment to innovative engineering and manufacturing excellence. The Banshee MK57 fills the gap between traditional pistol calibers and rifle cartridges, offering superior ballistic performance in a manageable package.