Chambered in one of the most popular PDW cartridges, 5.7x28mm, the Mk57™ SBR features an 8” barrel to better extract the full ballistic performance while still remaining lightweight and maneuverable.

May 31, 2019 · The CMMG Banshee Mk57 300 Series can be chambered in any of 10 cartridges ranging from .22LR to .458 SOCOM. The 5.7X28mm cartridge was developed for use in the select-­fire Fabrique Nationale (FN) P90 personal defense weapon (PDW), the semiautomatic PS90 carbine and the Five-­seven pistol.

Unlike the Mk 41, the Mk 57 is designed to be installed on the ship periphery instead of in centralized magazines. Developed by Raytheon, it provides backwards compatibility with existing missiles while allowing new missiles with significantly increased propulsion and payloads.

Chambered in 5.7x28mm this Mk57™ BANSHEE™ utilizes an 8” barrel to maximize the full potential of the 5.7x28mm round as a close-range personal defense caliber. Built on the Mk57 platform, this BANSHEE accepts FN®* Five-seveN®* pattern magazines and features an intuitive oversized mag release.

Engineered to perfection and chambered in 5.7 x 28 mm, this cutting edge firearm deploys an 8 inches barrel to unlock the true potential of the 5.7 x 28 mm round, rendering it an ideal close-range personal defense caliber.

The CMMG Banshee MK57 returns with expanded caliber options, now including the potent 5.7x28mm. This model of the Banshee AR-15 pistol is designed for enjoyment and performance, featuring a high-quality 4140 chrome moly steel barrel known for its durability and accuracy.

The CMMG Banshee Mk57 platform is designed to use FN Five-seveN pattern magazines and still offers the full range of AR15 operational features like last round bolt hold open, and can utilize standard AR15 triggers. 5.7x28mm has quickly become the personal defense weapon caliber of choice for many.

Built on the Mk57 platform, this BANSHEE accepts FN®* Five-seveN®* pattern magazines and features an intuitive oversized mag release. Rest assured that even with the use of pistol mags, conventional AR functionality like last round bolt hold open is here to stay in the Mk57.