Vortex%20Viper%20HS%20riflescopes%20offer%20hunters%20and%20shooters%20an%20array%20of%20features%20sure%20to%20be%20well%20received.%20The%20advanced%20optical%20system%2C%20highlighted%20with%20a%204x%20zoom%20range%2C%20provides%20magnification%20versatility.%20A%20forgiving%20eye%20box%20with%20increased%20eye%20relief%20gets%20shooters%20on%20target%20quickly%20and%20easily.%20Built%20on%20an%20ultra-strong%2030mm%20one-piece%20machined%20aluminum%20tube%2C%20the%20Viper%20HS%20delivers%20increased%20windage%20and%20elevation%20travel%20for%20optimal%20adjustment.