CMMG Banshee MK4 5.7x28mm 32+1 Black Nitride Threaded Barrel

The CMMG Banshee MK4 5.7x28mm delivers exceptional velocity and accuracy in a compact platform engineered for tactical applications. This pistol-caliber carbine harnesses the high-performance 5.7x28mm cartridge to achieve superior penetration and reduced recoil compared to traditional pistol calibers.

What Makes This Different

Built on CMMG's proven MK4 platform, this Banshee features radial delayed blowback operation that manages the high-pressure 5.7x28mm cartridge without requiring a buffer system. The medium taper barrel profile balances weight distribution while maintaining rigidity for consistent accuracy. Black nitride treatment provides corrosion resistance and reduces barrel wear significantly beyond standard phosphate coatings.

Key Features

• 5.7x28mm chambering with 32+1 round capacity for extended engagement capability
• Black nitride medium taper threaded barrel accepts suppressors and muzzle devices
• EML 11-inch M-LOK handguard provides modular accessory mounting
• Black Armor Cerakote aluminum Picatinny rail receiver ensures optics compatibility
• CMMG Zeroed grip system enhances control and ergonomics
• Radial delayed blowback system eliminates buffer tube requirement
• Ambidextrous controls accommodate left and right-handed operators

The 5.7x28mm cartridge achieves muzzle velocities exceeding 2,000 fps with minimal felt recoil, enabling rapid follow-up shots and extended training sessions. Law enforcement agencies value this caliber's barrier penetration capabilities, while competitive shooters appreciate the flat trajectory and reduced drop at distance. The threaded barrel accepts standard 1/2x28 muzzle devices for sound suppression or flash reduction.

Technical Specs

• Caliber: 5.7x28mm
• Capacity: 32+1 rounds
• Barrel: Medium taper profile, black nitride finish, threaded
• Handguard: EML 11-inch M-LOK compatible
• Receiver: Aluminum with Black Armor Cerakote finish
• Operating System: Radial delayed blowback
• Rail: Full-length Picatinny top rail
• Grip: CMMG Zeroed system
• Made in USA

This platform combines CMMG's manufacturing precision with the tactical advantages of the 5.7x28mm cartridge. The modular design accepts standard AR accessories while delivering performance characteristics unavailable in conventional pistol-caliber platforms.