Compatible with select riflescope magnification rings with a diameter of 1.739 inches / 44 mm Razor HD riflescopes with a rubber magnification ring Viper riflescopes with a metal magnification ring » PST Gen I models » HS-T models » HS LR models » HS models Strike Eagle Gen I 1-8x24 Viper XBR crossbow scope

Compatible with select riflescope magnification rings with a diameter of 1.930 inches / 49 mm • Razor HD Gen II riflescopes with metal magnification rings