From tree stands to mountain tops, the Vortex Viper HS-T riflescope features a forgiving eye box, repeatable tactical windage and elevation turrets, XD glass, XR fully multi-coated lenses, one-piece aircraft grade aluminum tube, o-ring, argon gas purging, low-glare matte finish, ArmorTek scratch-resistant coating, exposed tactical-style turrets, side focus, CRS Zero Stop, and fast focus eyepiece.