Alexander Arms Rifle Magazine AR-15 .17 HMR 10-Round Polymer Black 10RD. 17 HMR. This product is not compatible with any other rifle. Specifications for Alexander Arms AR-15 .17 HMR 10-Round Polymer Rifle Magazine: Manufacturer: Alexander Arms Color: Black Fabric/Material: Polymer Magazine Capacity: 10 Round Caliber: .17 Hornady Magnum Rimfire Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Quantity: 1 Weight: 0.2 lb Width: 0.75 in Number of Rounds: 10 Height: 1.2 in 1.5 in Length: 5.1 in 4 in Features of Alexander Arms AR-15 .17 HMR 10-Round Polymer Rifle Magazine Alexander Arms 10-round polymer magazine for our AR-15 .17 HMR. This product is not compatible with any other rifle. Package Contents: Alexander Arms AR-15 .17 HMR 10-Round Polymer Rifle Magazine What firearm models does the manufacturer say Alexander Arms AR-15 .17 HMR 10-Round Polymer Rifle Magazine is compatible with? The manufacturer suggests that Alexander Arms AR-15 .17 HMR 10-Round Polymer Rifle Magazine is compatible with AR-15Alexander Arms M-17HMRMAG-10RD: Rifle Magazine AR-15 .17 HMR 10-Round Polymer Black