Zero Stop
A mechanical feature on an elevation turret that lets a shooter spin back down to the rifle's zero by feel, without overshooting it.
A zero stop is a hard mechanical limit built into the elevation turret that physically prevents it from turning below the rifle’s established zero. After dialing up for a distant target, the shooter can spin the turret back down and feel it halt exactly at the zero setting, which removes any guesswork about whether the correct baseline has been restored. This matters most in low light or under stress, when reading the numbers on the dial is slow or impossible.
The feature is set during scope mounting, once the rifle is sighted in, by configuring the stop to catch at that zero point. From then on, dialing becomes a confident two-way process: turn up to the drop solution, engage, then spin home until the turret stops on its own. A reliable zero stop is one of the most valued features on a turret built for serious long-range work.