The XS Sights Low Weaver and Tall Weaver Backups are a fast alternative open sight that will save your hunt if your scope fails. Perfect for use on in-line muzzleloaders when hunting no-scope areas. Attaches in just seconds to any Weaver-Style base. Allows for easy load development when switching between optics and ghost ring sights. XS Ghost Ring WS is fully adjustable for windage and elevation and comes with two apertures .230" and .191" inside diameter for different lighting conditions. The large Ghost Ring affords great field of view for fast target acquisition.