A riflescope for tactical shooters at a reasonable price. The Vortex Viper PST Gen 2 features XD glass, XR fully multi-coated lenses for maximum light transmission, glass-etched reticle, one-piece aircraft-grade aluminum tube, o-ring seal, argon gas purging, ArmorTek scratch-resistant coating, tactical-style turrets, side focus, CRS zero stop, and a fast focus eyepiece.