CMMG Banshee MK57 5.7x28mm 8 in 20+1 Semi-Auto Pistol

The CMMG Banshee MK57 is a compact semi-auto pistol chambered in 5.7x28mm, built on CMMG's Mk57 AR-pattern platform and engineered to maximize the high-velocity, low-recoil 5.7x28mm cartridge as a close-range personal-defense package. The MK57 uses CMMG's radial-delayed blowback operating system paired with an 8" black nitride medium-taper threaded barrel for reliable cycling of 5.7x28mm ammunition.

The upper and lower receivers are machined from aluminum and finished in black Armor Cerakote for corrosion resistance and a low-glare profile, with a full-length Picatinny optics rail across the top of the receiver for mounting a red dot, prism scope, or magnifier. The EML 7" M-LOK handguard provides M-LOK accessory slots along the sides and bottom for lights, lasers, and foregrips, and the factory-threaded barrel is ready for a compensator or sound suppressor.

The Banshee MK57 accepts FN Five-seveN-pattern magazines with a 20+1 capacity and uses CMMG's oversized magazine release for fast reloads. Shooter-interface components come from CMMG's Zeroed accessory line, including the Zeroed polymer pistol grip and the Zeroed 60/90 degree ambidextrous safety selector. Iron sights are not included, leaving the top rail clear for an optic of the shooter's choice.

Weighing 5.20 lbs unloaded with an overall length of 23.70", the CMMG Banshee MK57 delivers AR-pattern ergonomics, controls, and modularity in a compact, optics-ready 5.7x28mm pistol platform.

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