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.Type: Tritium FrontFirearm Fit: Remington ShotgunFront Material: TritiumFront Color: Green w/White OutlineFirearm Type: Shotgun