Designed to feed any of our 5.7x28mm upper groups, the BANSHEE™ Mk57™ pistol lower group is feature packed and built with unmatched attention to detail. Whether you have a collection of FN®* Five-seveN®* style magazines already or like the notion of being able to share mags between handgun and personal defense weapon, the Mk57 pistol lower can make it happen. Available in seven different Cerakote finishes, the Mk57 lower comes outfitted with a variety of meticulously crafted CMMG parts and accessories, including:
