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 Swarovski Scopes: X5 3.5-18x50 PX5i 3.5-18x50 PZ3 4-12x50Z6 2-12x50Z6 3-18x50 PZ6 5-30x50 PZ6i 2-12x50Z6i 3-18x50 PZ6i 5-30x50 PZ8 2-16x50Z8i 2-16x50 PFits the Following Hawke Scopes: Airmax 3-12x50Airmax 4-16x50Airmax 6-24x50Endurance 2.5-10x50Endurance 4-16x50Endurance 6-24x50Frontier 2.5-15x50Frontier 3-15x50Frontier 5-30x50Sidewinder 4-16x50Vantage 2.5-10x50Vantage 3-12x50Vantage 3-9x50Vantage 4-12x50Vantage 4-16x50Fits the Following Other Scopes: Noblex N5 2.4-12x50Noblex N6 2-12x50Sig Sauer Sierra 3 4.5-14x50Fits the Following Leica Scopes: ER5 4-20x50ERi 3-12x50iFortis 6 2-12x50iMagnus 1.8-12x50Magnus 1.8-12x50iVisus 3-12x50Visus 3-12x50iFits the Following Vortex Scopes: Viper 3.5-10x50Viper 6.5-20x50Viper 6-24x50Viper HS 4-16x50Viper HS LR 4-16x50Viper HS LR 6-24x50Viper HST 6-24x50Viper PST 4-16x50Viper PST 6.5-20x50Viper PST 6-24x50 Tenebraex Flip Cover with Adapter Ring for 50mm Swarovski, Leica and Vortex Scopes VV0050-FCR