Warne Vapor rails are designed to offer shooters an affordable and reliable mounting platform manufactured for your specific firearm. - The V450-20MOA offers 20MOA of elevation built in for longer distance shooting. - Fits: Howa 1500 & Weatherby Vanguard Short Action Receivers does not fit Weatherby MK-V actions - 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.