One turret that can be configured three different ways on either the elevation or windage side.
The ballistic turret flex (BTF) can be used as a top or side turret and can be combined with all the available reticles. It can be configured separately and enables you always to stay on target at the desired distances. The BTF can be fitted without using any tool and has a lock mechanism that prevents you from turning it inadvertently. Fits all Z8i models.