This Harrison Design Extreme Service rear sight is the answer to customers who have asked me to produce a fixed rear sight to replace the factory installed adjustable target-style rear sight that Ruger uses on their SR1911 pistols. My sight gives you a rugged, easy handling rear sight with a great sight picture. All edges and corners are radiused to prevent snagging on clothing or your hands. The two-piece design allows mounting on Ruger's "Pocket-Style" sight cut. The sight notch dimensions are our standard .140" wide X .125" deep. This version is the Tritium Night Sight with two tritium lamps which give a '3-Dot" lamp arrangement, when combined with a tritium front sight.
Installation instructions are available at