Ruger American Rimfire/77 17 HMR/22WMR BX-15 Rifle Magazine 15 Round Black 1 Pack Polymer 15RD. Specifications for Ruger American Rimfire/77 17 HMR/22WMR BX-15 15 Round Rifle Magazine: Manufacturer: Ruger Color: Black Fabric/Material: Polymer Magazine Capacity: 15 Round Caliber: .22 Winchester Magnum Rimfire Gun Make: Ruger Gun Model: Ruger American Pistol Condition: New Package Contents: Ruger American Rimfire/77 17 HMR/22WMR BX-15 15 Round Rifle Magazine What firearm models does the manufacturer say Ruger American Rimfire/77 17 HMR/22WMR BX-15 15 Round Rifle Magazine is compatible with? The manufacturer says that Ruger American Rimfire/77 17 HMR/22WMR BX-15 15 Round Rifle Magazine is compatible with Ruger American PistolRuger 90585-15RD: American Rimfire/77 17 HMR/22WMR BX-15 Rifle Magazine 15 Round Black 1 Pack Polymer