After getting your Springfield Armory XD, one of the first things any defensive gun owner should do is add on a solid pair of defensive sights. These Trijicon Fiber Sight Sets are made to enhance the capabilities of Springfield's XD and XDs concealed-carry pistols. They provide a fast, durable and easily seen sighting system that aids shooters in getting on target quickly in any self-defense situation. Each Trijicon Fiber Sight Set is precisely cut to fit the dovetails found on all XD and XDs pistol slides and brings the same level of toughness and durability found in the company's other sighting systems to the world of fiber-optic sights. The thin front-sight blade allows for increased speed and accuracy and feature a bright-red front sight that easily catches ambient light for a bright focus point. The Trijicon Fiber Sight Set includes a rear U-notch that measures 0.125 inch wide and sits 0.307 inch above the slide. The front-sight blade width measures 0.110-inch and the front sight sits 0.138 inch above the slide. Trijicon recommends that professional gunsmiths install these sights to ensure proper sighting and retention.