CMMG Mk4/AR-15 .22 LR 25 Round Rifle Magazine Black 25 22AFC2B. It features a 25-round capacity and is compatible with .22LR conversion kits and CMMG Mk4/mil-spec AR15 lower receivers. Specifications for CMMG Mk4/AR-15 .22 LR 25 Round Rifle Magazine: Manufacturer: CMMG Color: Black Gun Make: AR Platform Gun Model: CMMG Mk4 AR-15 Gun Type: Rifle Caliber: .22 Long Rifle Magazine Capacity: 25 Round Quantity: 1 Condition: New Features of CMMG Mk4/AR-15 .22 LR 25 Round Rifle Magazine: 25-Round Capacity Compatible With .22LR Conversion Kits Compatible With CMMG Mk4/mil-spec AR15 Lower Receivers Package Contents: CMMG Mk4/AR-15 .22 LR 25 Round Rifle Magazine What firearm models does the manufacturer say CMMG Mk4/AR-15 .22 LR 25 Round Rifle Magazine is compatible with? The manufacturer says that CMMG Mk4/AR-15 .22 LR 25 Round Rifle Magazine is compatible with AR-15 CMMG Mk4CMMG 22AFC2B: Mk4/AR-15 .22 LR 25 Round Rifle Magazine Black 25