Vortex Viper PST 4-16x50 FFP Riflescope is a Precision Shooting Tactical riflescope born from forward-thinking engineering. The Viper PST 4-16x50 Riflescopes can be classified with top-tier Riflescopes, but with an affordable price. Get the same performance and features tactical shooters demand at a reasonable price. Gain ample windage and elevation adjustment with this Vortex riflescope. The Viper PST 4-16x50 FFP allows accurate, fast dialing of shots with its matching reticle and turret measurements. The Viper 4 16x50mm FFP riflescope by Vortex is a one-piece 30mm tube was manufactured from a single solid block of aircraft grade aluminum. The Vortex Viper 4-16x50 riflescopes have a one-piece tube that maximizes alignment for improved accuracy and optimum visual performance as well as strength and waterproof. This Vortex Fogproof Riflescope has optical features such as XD lens elements which enhance resolution, color and contrast, and XR lens coatings which increases light transmission, that will maximize your shooting.