The Viper PST Gen II hands an unfair advantage to shooters who seek to keep the upper hand in every situation from close quarters to long-range shots. The illumination dial is located on the opposite side of the windage knob for easy access and streamlined performance. The reticle offers shooters highly functional, intuitive, and detailed hold points, yet remains uncluttered for optimal viewing and features 10 intensity levels with off positions between each setting. This is TSI's favorite 0 to 600 meter scope. It works great on any .223/5.56 AR15 platform.