Vortex Viper PST series of riflescopes have been designed after the immense success of the Vortex Razor HD series and have been specified for users who could sacrifice some Vortex Razor HD features for a lower price. The Vortex Viper PST riflescopes are still made in the same way the Razor HDs are. The Vortex Viper PST has features like open style turrets for reticle adjustment, waterproof qualities, argon filled housing for fog proof properties even at low temperatures, adjustable reticle illumination with the click value of reticle turrets being the same as the distance between two dots in the reticle. Vortex Viper PST structure is made out of light materials but is still in one piece and able to withstand extreme loads. The buyer can choose between reticles in the first or in the second focal plane which, in any case, accounts for wind drift of bullet and bullet drop. The Vortex Viper PST uses a special system to stop the turrets on a single point on which the rifle is zeroed in without having to count any clicks. This way it is possible to return the reticle in its basic position easily when having to take long distance shoots. Vortex Viper PST riflescopes have a lifetime warranty.