The CMMG BANSHEE Mk57 represents a purpose-built AR pistol platform, optimized for compact utility and the potent 5.7x28mm cartridge. Engineered on the robust Mk57 receiver set, this platform integrates CMMG’s proprietary Radial Delayed Blowback operating system, ensuring reliable function and mitigating felt recoil for rapid target acquisition and follow-up shots. Designed to accept readily available FN Five-seveN pattern magazines, the BANSHEE Mk57 prioritizes logistical commonality and operational efficiency.
Key Features
Operating System and Performance
The core of the BANSHEE Mk57’s performance lies in its Radial Delayed Blowback system. This mechanism effectively manages the pressure curve of the 5.7x28mm cartridge, resulting in a smoother operating cycle compared to traditional direct blowback designs. The platform’s compatibility with FN Five-seveN pattern magazines, coupled with an intuitive, oversized magazine release, ensures positive magazine insertion and rapid manipulation under dynamic conditions.
Ergonomics and Interface
KFF Defense emphasizes components that enhance shooter interface and control. The BANSHEE Mk57 is equipped with a comprehensive suite of CMMG ZEROED parts, including a precision drop-in trigger for a crisp, consistent break. An ambidextrous 60/90 degree safety selector and an AR15-pattern ambidextrous charging handle facilitate intuitive operation for both left- and right-handed users. The CMMG ZEROED pistol grip provides a secure hold. The EML handguard offers full-length M-LOK slots on the sides and bottom, with additional M-LOK mounting points integrated between the top Picatinny rail sections, providing extensive accessory mounting options without excessive bulk.
Construction and Materials
Constructed with durability and service life in mind, the BANSHEE Mk57 utilizes robust materials throughout. The CMMG ZEROED components, including the bolt catch and polymer dust cover, are selected for their reliable performance and resistance to operational stressors. The integrated linear compensator, designed for 9mm, effectively manages muzzle rise and blast, enhancing control in a compact package.
Technical Specifications
- **Model:** CMMG BANSHEE Mk57
- **Caliber:** 5.7x28mm
- **Operating System:** Radial Delayed Blowback
- **Barrel Length:** 5-inch
- **Handguard:** CMMG EML M-LOK
- **Muzzle Device:** CMMG ZEROED Linear Compensator (9mm)
- **Trigger:** CMMG ZEROED Drop-in Trigger
- **Safety:** CMMG ZEROED 60/90 Degree Ambidextrous Safety
- **Charging Handle:** CMMG ZEROED AR15 Ambidextrous Charging Handle
- **Grip:** CMMG ZEROED Pistol Grip
- **Bolt Catch:** CMMG ZEROED Bolt Catch
- **Dust Cover:** CMMG ZEROED Polymer Dust Cover
- **Magazine Compatibility:** FN Five-seveN Pattern
- **Magazine Included:** One (1) 20-round ProMag
- **Finish:** Black
- **Category:** AR Pistol
