Having more options is always better. The Mk17(TM) platform is another evolution of CMMG(R)'s 9mm lineup. This BANSHEE(TM) pistol lower group gives shooters the ability to use any new or existing CMMG 9mm Radial Delayed Blowback(TM) upper and utilize Sig P320/M17/M18-pattern magazines. BANSHEE Mk17 pistol lower groups are available in seven different Cerakote finishes and come outfitted with a variety of meticulously crafted CMMG parts and accessories, including:ZEROED Pistol GripZEROED 60deg/90deg Ambi SafetyZEROED AR15 Bolt CatchLifetime Quality GuaranteeWe aim to please, that's why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects.Learn More.**Mk17 Lowers are designed for use with CMMG 9mmRadial Delayed Blowback uppers only**