CMMG 57A340FAB Banshee MK57 5.7x28mm 20 8" Black Nitride Medium Taper Threaded Barrel, EML 7" M-LOK Handguards, Black Armor Cerakote Aluminum Picatinny Rail Receiver, CMMG Zeroed Grips

The CMMG Banshee MK57 5.7x28mm carbine delivers a compact, low-recoil platform purpose-built for shooters seeking modern ergonomics and modular capability in a 5.7×28mm format. Chambered in the FN Five-seveN pattern cartridge, this 20-inch 8-inch barreled system accepts standard FN magazines and features CMMG's proven radial delayed blowback operating system, engineered for reliable function and predictable handling characteristics across diverse training and duty scenarios.

Built on a black nitride medium taper threaded barrel with black armor cerakote aluminum receiver, the Banshee MK57 ships with a complete CMMG zeroed components package: ambi safety lever (60/90 degree), pistol grip, drop-in trigger, AR15-pattern ambi charging handle, bolt catch, linear compensator, and polymer dust cover. The 7-inch EML handguard features full-length M-LOK slots on both sides and underside, plus M-LOK positions between top picatinny rail sections, enabling flexible mounting of lights, lasers, and tactical accessories. The oversized magazine release provides intuitive control and allows rapid magazine changes under time-pressured conditions. Overall weight of 9.2 pounds balances the system for extended shooting sessions without excessive muzzle-heavy feel.

This configuration suits operators, law enforcement trainers, and civilian shooters evaluating the 5.7×28mm cartridge for its reduced recoil impulse, lower report, and minimal sound signature compared to traditional rifle calibers. The compact profile and light recoil characteristics make the MK57 suitable for transitional carbine work, specialized training environments, and precision shooting disciplines where controllability is paramount. The threaded barrel accommodates suppressors and muzzle devices for mission-specific configuration.