CMMG 22AC60FAB: If you\'re wondering how small a CMM Banshee can be we have your answer. At just 4.5 this is the shortest barrel offered on any CMMG AR. This dedicated .22 LR Banshee is the ideal choice for anyone looking for a cheap to run plinking gun or training tool. - Platform Mk4 - Caliber .22 LR - Operating System Traditional Blowback - Barrel Length 4.5 - Barrel Twist 1:16 - Barrel Contour MT - Barrel Material 4140CM SBN - Barrel Twist 1:16 - Muzzle Device CMMG Zeroed Flash Hider - Muzzle Thread 1/2 X 28 - Upper Receiver Billet 6061 T6 Aluminum - Lower Receiver Mk4 Forged 7075 T6 Aluminum - Hand Guard CMMG EML4 M-LOK - Finish Cerakote Standard - Charging Handle CMMG Zeroed Ambi .22 LR - 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 25rd - Weight 4.2 lbs - Length 19.9