XS Sights Big Dot Tritium Shotgun Sight is made for any shotgun that has a #6 bead sight on a plain barrel. The purpose of this front sight is to improve sight acquisition speed, while the tritium lamp aids sight alignment in all lighting conditions. The Big Dot Tritium Sight is a bead on plain barrel sight. This sight requires a front bead sized .12"-.14" in diameter for installation. This sight is attached with epoxy over an existing #6 bead. If your shotgun is not equipped with a #6 size bead, you will have to install one. Note: Mossberg factory bead with hex base will not work with this sight. XS Big Dot Tritium Front Sight is a stand-alone solution and does not work with any Ghost Ring solutions.