Long-range shooting for the military has been made easier thanks to the Trijicon ACOG/RMR Combos. ACOG/RMR combos provide the up-close target acquisition for close quarters/CQB in addition to long-range targets. This dual-sighting system gives the shooter a distinct tactical advantage with the option of either the Trijicon ACOG or the RMR Sight. With the quick target acquisition of the RMR Sight or the precise aiming capabilities provided by the magnified Trijicon ACOG, the shooter has the ability to select the proper aiming solution for the situation at hand - truly the best of both worlds. Powered by Trijicon’s patented fiber optics and tritium-based technology, Trijicon ACOG/RMR scopes can feature a multiple reticles and configurations. To further improve target acquisition and hit potential, Trijicon ACOG/RMR scopes incorporate Trijicon’s Bindon Aiming Concept – which allows for both eyes open for aiming. A Trijicon RMR sits on top, and can feature several different sizes of aiming dot. Reticle ImagePlease see the reticle image here: Trijicon ACOG/RMR Features And OptionsThese encompass the options of this product line, check the product specifications to be sure you have the scope combo with desired features. Magnification - 3x - 6xSize - 32mm - 48mmWeight, 7.7 oz - 39.3 ozFiber Optics and Tritium Illumination SourceReticle Pattern - Crosshair, ChevronDay Reticle Color - Red, Green, Black, or AmberNight Reticle Color - Red, Green, Black, or AmberHousing Material - Forged AluminumMount Options - TA75, TA51, Quick ReleaseCalibration - .50 BMG, .223 Trijicon 4x32 ACOG ECOS Illum Amber Crosshair 5.56 Reticle w/Iron Sights QR Mount - LED 3.25 MOA Red RMR Type 2 - FDE TA01-D-100555