Rugged, steel rear sight has quick-to-use, single screw adjustment for windage and elevation that won't work loose with recoil. Ghost ring aperture has two tritium inserts for fast, accurate, sight picture. Steel, post front sight has single, glowing tritium dot that puts you on target fast in daylight or darkness. Glass lamps are sealed within aluminum cylinders with polished sapphire windows that give a crisp outline of light. Mfg: Trijicon SPECS: Steel, matte finish, black. Fits plain barrel Rem. 870, 1100 and 11-87. May be adapted to other models. Requires drilling and tapping receiver. Front sight epoxies over factory sight. Includes epoxy.