CMMG BANSHEE MK57 pistol in 5.7x28mm with Mk57 platform features, radial delayed blowback operation, CMMG ZEROED accessories, and a 20rd Promag magazine in armor black finish.
The CMMG BANSHEE MK57 is a compact pistol built on the Mk57 platform chambered in 5.7x28mm. It uses a radial delayed blowback operating system and is configured to accept FN® Five-seveN® pattern magazines, retaining common AR-15 operational features. The package includes CMMG ZEROED components and a 20rd Promag magazine, making the platform well suited to precision-oriented modern pistol applications. For an optic under $1,000 that pairs well with this platform, consider a Trijicon MRO for clear sight picture and fast target acquisition.
Product Specifications
The platform is Mk57.
The caliber is 5.7x28mm.
The operating system is Radial Delayed Blowback.
The barrel length is 5.
The barrel twist is 1:9.
The barrel contour is MT.
The barrel material is 4140CM SBN.
The muzzle device is a CMMG ZEROED Linear Compensator.
The muzzle thread is 1/2 x 28.
The upper receiver is Billet 6061 T6 Aluminum.
The lower receiver is Mk57 Forged 7075 T6 Aluminum.
The hand guard is CMMG EML4 M-LOK.
The finish is Cerakote Standard.
The charging handle is CMMG ZEROED Ambi.
The magazine is 20rd Promag.
The UPC is 810148624446.
This BANSHEE MK57 combines compact handling with the distinct ballistics of 5.7x28mm, packaged with CMMG’s ZEROED controls and construction-grade receivers. Its feature set makes it a capable choice for precision-focused range work and competitive pistol formats where controllability and magazine capacity matter.
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