Mossberg Magazine 817 17HMR 5RD 5RD. Specifications for Mossberg Magazine 817 17HMR 5 Round: Manufacturer: Mossberg Color: Black Magazine Capacity: 5 Round Caliber: .17 Hornady Magnum Rimfire Gun Model: Mossberg Model 817 Quantity: 1 Capacity: 5 Rounds Package Contents: Mossberg Magazine 817 17HMR 5 Round What firearm models does the manufacturer say Mossberg Magazine 817 17HMR 5 Round is compatible with? The manufacturer says that Mossberg Magazine 817 17HMR 5 Round is compatible with Mossberg Model 817Mossberg 95887-5RD: Magazine 817 17HMR 5RD