CMMG Mk4 .22LR Banshee Upper Group Receiver 9in Coyote Tan. 22 LR build or have a dedicated .22 upper for some cheap plinking put the 9 BANSHEE on your list. Designed to work with CMMG .22 AR Conversion Mags and any standard AR15 lower group this .22 LR upper doesnt just look like an AR it is an AR and comes ready to accessorize to fit you best. Specifications for CMMG Mk4 .22LR 9in Banshee Upper Group Receiver: Manufacturer: CMMG Caliber: .22 Long Rifle Overall Length: 17.4 in Barrel Length: 9 in Barrel Profile: Medium Tapered Barrel Twist Rate: 1-16 Threads per Inch: 1/2x28 Muzzle Device: CMMG Zeroed Flash Hider Fabric/Material: 6061-T6 Aluminum Gun Rail: M-LOK Gun Make: CMMG Gun Model: CMMG Mk4 Weight: 2.9 lb Magazine Included: No Mount Type: M-LOK Package Contents: CMMG Mk4 .22LR 9in Banshee Upper Group Receiver What firearm models does the manufacturer say CMMG Mk4 .22LR 9in Banshee Upper Group Receiver is compatible with? The manufacturer says that CMMG Mk4 .22LR 9in Banshee Upper Group Receiver is compatible with CMMG Mk4CMMG 22B8F8B-CT: Mk4 .22LR Banshee Upper Group Receiver 9in Coyote Tan