The CMMG Mk57 Banshee pistol, part number 57A889DAB, is a compact semi-automatic firearm chambered in 5.7x28mm. Built around a durable 7075-T6 aluminum receiver with a black Cerakote finish, this pistol combines lightweight handling with practical modern features. Its 8-inch chrome-moly barrel receives a black nitride finish and uses a 1:9 twist rate for reliable performance with compatible 5.7x28mm ammunition. A compensator and 1/2-inch-28 thread pattern provide additional muzzle configuration options.
The Mk57 platform is designed for adaptable setup and convenient controls. An M-Lok handguard supports compatible accessories, while the optic-ready configuration allows users to select an appropriate aiming solution. The pistol features an ambidextrous safety lever, right-hand configuration, black polymer grips, and a single-stage trigger. Its CMMG six-position RipBrace offers adjustable support and a compact profile suited to the pistol format.
This CMMG Banshee includes one magazine with a 20-round capacity and supports a listed capacity of 20+1. The black frame, black receiver finish, and synthetic brace create a consistent armor-black appearance. With a manageable unloaded weight of approximately 5.2 pounds and a compact overall profile, the Mk57 is suited for range use, training, and defensive applications where legally permitted. As a firearm, the CMMG Mk57 must be handled, transferred, and used in accordance with all applicable federal, state, and local laws.
Features:
- Brand and Part Number: CMMG Mk57 Banshee, 57A889DAB
- Caliber: 5.7x28mm
- Action: Semi-automatic
- Barrel: 8-inch chrome-moly barrel with black nitride finish
- Barrel Twist: 1:9
- Receiver: 7075-T6 aluminum with black Cerakote finish
- Handguard: M-Lok compatible
- Muzzle: Compensator with 1/2-inch-28 thread pattern
- Capacity: 20+1 with one 20-round magazine included
- Sights: Optic-ready configuration
- Safety: Ambidextrous safety lever
- Trigger: Single-stage
- Brace: CMMG six-position RipBrace
- Grip: Black polymer
- Weight: Approximately 5.2 pounds
