The CMMG Banshee MK57 is an AR-style pistol chambered in 5.7x28mm intended for range use and defensive carry where compact performance is required. This compact platform accepts FN Five-seveN pattern magazines and ships with a suite of factory ZEROED components for immediate use.

Built on the Mk57 platform, the pistol features a 5″ black nitride medium-taper threaded barrel paired with an M-LOK EML handguard that provides full-length M-LOK slots on both sides and the bottom. The receiver is an aluminum assembly finished in Black Armor Cerakote with a Picatinny rail, and the package includes a black pistol tube and a CMMG ZEROED grip for consistent ergonomics.

Key Specifications

The caliber is 5.7x28mm.
The capacity is 20+1.
The barrel length is 5 inches.
The barrel finish and profile is black nitride medium-taper threaded.
The handguard is EML with full-length M-LOK slots.
The receiver is aluminum with Black Armor Cerakote and a Picatinny rail.
The operating system is radial delayed blowback.
The pistol accepts FN Five-seveN pattern magazines.
The package includes a 20rd ProMag magazine.
The included ZEROED parts set is pistol grip, drop-in trigger, 60/90 degree ambidextrous safety, linear compensator (listed as 9mm), AR-15 ambidextrous charging handle, bolt catch, and polymer dust cover.

The CMMG Banshee MK57 delivers compact, configurable performance in a purpose-built AR-style pistol platform. Consider purchasing the CMMG Banshee MK57 5.7x28mm online today for a compact range and defensive firearm that ships with a full complement of ZEROED parts.