The Big Dot Tritium front sight improves sight acquisition speed and tritium enhances Low-Light use of the defensive shotgun. These sights require Remington factory size front bead for installation. It will work with a .125 - .140 diameter bead The XS Big Dot Tritium Front is a stand-alone solution and does not work with any Ghost Ring sight solutions. Note: If your shotgun is not equipped with a #6 size bead, one will have to be installed.