Vortex Viper HS riflescopes offer an array of features sure to be well received. The advanced optical system, highlighted with a 4x zoom range, provides magnification versatility. A forgiving eye box with increased eye relief gets shooters on target quickly and easily. Built on an ultra-strong 30mm one-piece machined aluminum tube, the Viper HS delivers increased windage and elevation travel for optimal adjustment. MAG-View Fiber Optic. Provides a highly visible reference point for the magnification setting. Fast Focus Eyepiece. Allows quick and easy reticle focusing.