Equipped with a 5 barrel this BANSHEE is one of the shortest 9mm pistols CMMG® offers. What sets this BANSHEE apart is the Mk17 platform lower which is designed to use Sig Sauer P320/M17/M18 pattern magazines. Being able to use handgun magazines in a pistol caliber carbine or personal defense weapon allows shooters to use their existing collection of magazines mag pouches and other accessories. – Platform Mk17 – Caliber 9mm – Operating System Radial Delayed Blowback – Barrel Length 5 – Barrel Twist 1:10 – Barrel Contour MT – Barrel Material 4140CM SBN – Barrel Twist 1:10 – Muzzle Device CMMG ZEROED Linear Compensator – Muzzle Thread 1/2 x 28 – Upper Receiver Billet 6061 T6 Aluminum – Lower Receiver Mk17 Forged 7075 T6 Aluminum – Hand Guard CMMG EML4 M-LOK – Finish Cerakote Standard – Charging Handle CMMG ZEROED Ambi – Pistol Grip CMMG ZEROED Pistol Grip – Buffer Type Carbine – Receiver Extension CMMG 6 Position Fastback Extension – Stock / Brace CMMG RipBrace – Trigger Type ZEROED Drop-In Single Stage – Trigger Guard Integrated – Safety Selector CMMG ZEROED 60/90 Degree – Magazine Sig Sauer P320 21rd – Weight 4.9 lbs – Length 20.8