Your SWFA Gen 2 riflescope comes equipped with the Modular Turret System which contains a built in zero stop and 6+ possible unique turret combinations for the ultimate user customizable experience regardless of the application. In order to remove a turret, simply loosen the set screw and lift the turret cap off of the turret assembly. Your MTS also features thread protectors to cover your threads when running any of the turrets exposed. The thread protectors have small slots on them 180 degrees apart from one another, these can be used with your fingernail or a small flat head screw driver to tighten or loosen your thread protectors if necessary.