For hunters and shooters, the Vortex Viper HS riflescope features a forgiving eye piece, increased eye relief, XD glass, XR fully-multi coated lenses for maximum light transmission, o-ring seal, argon gas purging, ArmorTek scratch-resistant coating, capped reset turrets, side focus, one-piece aircraft grad aluminum tube, increased windage and elevation travel for optimal adjustment, and fast focus eyepiece.