The Vortex Viper PST 5-25x50 is a high-quality variable scope designed for rifles. It features a 50mm objective lens diameter, a maximum magnification of 25x, and an illuminated red reticle. This scope is powered by batteries and is designed with a 30mm tube diameter for durability. The Viper PST Gen II model is known for its precision and accuracy, making it a popular choice among hunters and shooters looking for a reliable scope for their firearm.