Improves sight pickup and visibility during low-light hours when game is most active. All sights include the rugged TraserA(R) luminous, sapphire crystal, tritium lamps for a bright, well-defined aiming point and extra-long life. Lamps guaranteed by the manufacturer to remain self-luminous for 12 years. Mfg: Trijicon SPECS: Steel body, blued. Tritium insert. Includes front and rear sight unless shown in chart. All sights are adjustable if shotgun barrel was originally equipped with factory adjustable sights.