ACOG 3.5x35 scope with green chevron reticle-the ranging reticle is calibrated for 5.56 (.223 cal.) flat-top rifles to 1000 meters. Includes Flat Top Adapter. Daytime illumination is provided by fiber optics and tritium illuminates the scope at night. The TA11-C-100238 combines the technology of the 3.5x35 Trijicon ACOG gun sight with the 3.25 MOA Trijicon RMR red dot sight. This provides the shooter with the option of quick acquisition close range sighting with the Trijicon RMR sight and the precision for longer range shooting with the Trijicon ACOG 3.5x35.