Developed for quick target acquisition, the Trijicon RMR Reflex Sight is designed for mounting atop the Trijicon ACOG (Advanced Combat Optical Gunsight) Riflescope.The Trijicon RMR sight features an innovative LED (light emitting diode) insert to sense the target's light level and control the light output of the LED. This technology ensures optimum visibility of the red dot against the target. Power is provided by a long-life lithium battery. Accuracy is enhanced with adjustments for windage and elevation. And, performance is assured with a stronger-than-aluminum, polymer alloy body. Tough, yet smaller and lighter than any alternative, the Trijicon RMR Red Dot Sight is suitable for all military and law enforcement applications.