SPECS: Machined steel, black, matte finish. Front sight - ¾” (19mm) long, 1⁄8" (3.2mm) wide, 3⁄8" (8.9mm) high, .11” (2.8mm) O.D. white ring with green tritium center. Rear sight - 11⁄16" (17mm) long, 7⁄16" (11mm) wide, 5⁄16" (7.9mm) high, with .13” (3.3mm) wide notch. Two .07” (1.8mm) O.D. yellow tritium centers. Fits factory ramp sights on Rem 870, 1100, and 11-87 shotguns, 12 gauge only; plus early Model 74, 76, 740, 760, 7400, and 7600 rifles. Replaces factory front dovetail sight and barrel mounted rear sight only.