Introducing the XS Sights SG20013: This innovative Big Dot Tritium front sight significantly enhances the speed of sight acquisition and its tritium component boosts low-light usage for defensive shotguns. Installation necessitates a Remington factory size front bead. Suitable for a bead with .125 - .140 diameter.Please be informed that the XS Sights Big Dot Tritium Front operates as a stand-alone solution and is not compatible with any Ghost Ring sight solutions. Take note that if your shotgun doesn\'t come with a #6 size bead, you\'ll need to install one separately.