The Scattergun Technologies TRAK-LOCk II Ghost Ring Sights are constructed of bar stock steel and offers twice the vertical adjustment of the original TRAK-LOCk without losing any of the sight acquisition speed favored by law enforcement professionals. The TRAK-LOCK II features a tritium insert in the front sight for use in low light and the rear sight is fully adjustable for windage and elevationn with a single set screw. Easy to install, the sight fits Remington 12- and 20-gauge 870, 1187, and 1100 shotguns.