Tenebraex Vortex Razor HD Gen II 4.5-27x57 Adapter Ring VR0056-AR acts as a unique and useful piece of device. It helps in the installation or attaching of an array of accessories like ARDs, flip covers or flip caps to the rifle scope. Built in compatibility with Vortex Razor HD Gen II 4.5-27x57 scopes, the black Tenebraex VR0056-AR adapter ring is to be placed at the objective end of the scope. Tenebraex Vortex Razor 4.5-27x57 Adapter Ring VR0056-AR