This Tenebraex objective flip cover provides protection to your lens and flips up out of the way when it is time to shoot and includes an adapter ring. Fits the Following Vortex Scopes: Razor HD AMG 6-24x50Viper 6.5-20x44Viper 6.5-20x50Viper PST 6.5-20x50Fits the Following Other Scopes: Bushnell Elite Tactical DMR IIi 3.5-21x50mm and HDMR II 3.5-21x50mmEOTech Vudu 5-25x50Leica ER5 3-15x56 and ER5 4-20x50 Tenebraex Black Flip Cover with Adapter Ring for Ocular Lens UAC008-FCR