Warne, Vapor, 1 Piece Base, 20 MOA, Fits Winchester XPR Short Action w/8-40 Receivers, Matte Finish, Black NEW Precision CNC machined from 6061/T6 aluminum Mil-Spec hardcoat anodized finish for abrasion and corrosion resistance Self centering tapered T-15 Torx screws Fits Picatinny & weaver style rings and are NATO-STANAG compatible Fits: Winchester XPR Short Action, w/8-40 screw receiver Product Description Warne Vapor rails are designed to offer shooters an affordable and reliable mounting platform manufactured for your specific firearm. Warnes Vapor rail 20MOA options offer additional elevation built in that is necessary for longer distance shooting applications.