Franklin Armory F17 SPR Rifle Magazine .17 WSM 20 Round Black 1 Pack Polymer 20RD. Specifications for Franklin Armory F17 SPR .17 WSM 20 Round Rifle Magazine: Manufacturer: Franklin Armory Color: Black Fabric/Material: Polymer Magazine Capacity: 20 Round Caliber: .17 Winchester Super Magnum Package Contents: Franklin Armory F17 SPR .17 WSM 20 Round Rifle Magazine Franklin Armory 0050422BLK-20RD: F17 SPR Rifle Magazine .17 WSM 20 Round Black 1 Pack Polymer