Winchester XPR .300WM/338WM Detachable Box 3 Round Rifle Magazine Black 1 Pack Polymer 3RD. The magazine is a slick and slim single stack design that feeds cartridges in a straight line right into the chamber. Nothing could be more straight-forward. Specifications for Winchester XPR .300WM/338WM Detachable Box 3 Round Rifle Magazine: Manufacturer: Winchester Color: Black Fabric/Material: Polymer Magazine Capacity: 3 Round Caliber: 7mm Remington Magnum Gun Make: Winchester Gun Model: Winchester XPR Package Contents: Winchester XPR .300WM/338WM Detachable Box 3 Round Rifle Magazine The Winchester Guns 112098801 XPR 300 Winchester Magnum/338 Winchester Magnum 3 Rd B is a quality addition to the Winchester lineup. For more great deals on Rifle Magazines by Winchester please browse our Winchester Magazines page. What firearm models does the manufacturer say Winchester XPR .300WM/338WM Detachable Box 3 Round Rifle Magazine is compatible with? The manufacturer suggests that Winchester XPR .300WM/338WM Detachable Box 3 Round Rifle Magazine is compatible with Winchester XPRWinchester 112098801-3RD: XPR .300WM/338WM Detachable Box 3 Round Rifle Magazine Black 1 Pack Polymer