Quick, intuitive aiming is the goal with any pistol sight, and the Trijicon RMR allows for faster shooting than standard irons. The Trijicon Glock MOS and Springfield OSP RMR Mounting Kit makes it easy to mount the company's combat-proven red-dot optic onto any compatible Glock or Springfield pistol slide. The kit includes a sealing plate and short mounting screws, along with the proper-sized Hex key for installation. The plate and screws are finished black. The company warns that the two long screws included with the RMR will not fit on these pistol slides. This kit is necessary to mounting the red dot onto Glock and Springfield handguns. Mfg: Trijicon