The CMMG Banshee Mk57 braced pistol in 5.7x28mm with an Armor Black Cerakote finish and 5-inch barrel (brand part no. 57A2E0FAB) delivers near-.22 LR levels of recoil with performance that rivals 5.56mm at close range. CMMG designs the Mk57 platform to run FN Five-seveN pattern magazines while retaining the full range of AR-15 operational features, including last-round bolt hold open and standard AR-15 trigger compatibility. A radial delayed blowback operating system, a CMMG ZEROED Linear Compensator, and a 6061-T6 aluminum upper paired with a 7075-T6 forged lower keep the pistol light at 4.8 pounds. The CMMG RipBrace, ZEROED ambidextrous charging handle, and EML4 M-LOK handguard round out the build. Among 5.7x28mm semi-auto handguns, this Banshee Mk57 configuration favors shooters who want low recoil with rifle-like reach.

Key Specifications

• The chambering is 5.7x28mm, offering near-.22 LR recoil with rifle-caliber-adjacent performance.
• The barrel measures 5 inches, made from 4140CM SBN steel with a 1:9 twist.
• The operating system is radial delayed blowback.
• The pistol uses FN Five-seveN pattern magazines and standard AR-15 triggers.
• The handguard is CMMG EML4 M-LOK, and the finish is standard Cerakote.
• The unloaded weight is 4.8 pounds.

Frequently Asked Questions

What magazines does this pistol use? FN Five-seveN pattern magazines, with a 20-round Promag included.

Does this pistol use standard AR-15 parts? Yes, it retains AR-15 operational features including last-round bolt hold open and standard trigger compatibility.

Buy the CMMG Banshee Mk57, 5.7x28mm

Low recoil with rifle-caliber-adjacent performance is exactly what this Banshee Mk57 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.