CMMG Mk4/AR-15 .22 LR 10 Round Rifle Magazine Black. 22LR 10-Round Magazine offers smooth and consistent operation in virtually any target shooting or training application. Specifications for CMMG Mk4/AR-15 .22 LR 10 Round Rifle Magazine: Manufacturer: CMMG Magazine Body Material: Polymer Gun Make: AR Platform Gun Model: CMMG Mk4 AR-15 Gun Type: Rifle Caliber: .22 Long Rifle Magazine Capacity: 10 Round Condition: New Package Contents: CMMG Mk4/AR-15 .22 LR 10 Round Rifle Magazine What firearm models does the manufacturer say CMMG Mk4/AR-15 .22 LR 10 Round Rifle Magazine is compatible with? The manufacturer suggests that CMMG Mk4/AR-15 .22 LR 10 Round Rifle Magazine is compatible with AR-15 CMMG Mk4CMMG 22AFC77: Mk4/AR-15 .22 LR 10 Round Rifle Magazine Black