One of the hottest contenders in the personal defense caliber market 5.7x28mm has won favor with shooters all over the world and for good reason. This cartridge was designed to provide rifle caliber-like ballistics with less recoil than most pistol caliber carbines. If you like the modularity potential of the AR15 platform you’re in luck this BANSHEE is built on our Mk4 AR15 platform which uses a standard AR15 lower receiver and our new and improved 5.7x28mm AR conversion mags which means no need for a propriety lower. – Platform Mk4 – Caliber 5.7x28mm – Operating System Radial Delayed Blowback – Barrel Length 8 – Barrel Twist 1:9 – Barrel Contour MT – Barrel Material 4140CM SBN – Barrel Twist 1:9 – Muzzle Device CMMG ZEROED Linear Comp – Muzzle Thread 1/2 X 28 – Upper Receiver Billet 6061 T6 Aluminum – Lower Receiver Mk4 Forged 7075 T6 Aluminum – Hand Guard CMMG EML7 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 CMMG ZEROED Trigger Guard – Safety Selector CMMG ZEROED 60/90 Degree – Magazine CMMG 32rd – Weight 5 lbs – Length 23.7