The Dual-Illuminated RMR uses fiber optics and tritium to illuminate the reticle. Fiber optics collect ambient light, automatically adjusting the reticle brightness. In situations with no (or low) light, the tritium illuminates the reticle. This version is popular with shooters who prefer a battery-free solution. The RM08 family has an amber 12.9 MOA triangle. The triangle can be used in two unique ways: the tip of the triangle offers a fine aiming solution for precision shooting or shooting at distance, or the entire reticle can be used for rapid acquisition in close shooting situations.