Vortex Viper HS riflescopes are basically another version of the much appreciated Viper PST series although they are mainly meant for hunting. They do not have an illuminated reticle and do not offer the option of the reticle in the first focal plane. They still offer waterproof quality, argon filled housing to prevent dew build up at low temperatures, multicoated lens surfaces and high quality glass materials. Whether if it is in image sharpness, contrast or light transmission, Vortex Viper HS riflescopes are class leading. The one piece construction can withstand extreme loads, which means it can be placed in the most powerful hunting rifles without the reticle going out of alignment. Vortex Viper HS riflescopes have a lifetime warranty.