This is a new 4x32 Trijicon ACOG (TA31-ECOS-G) w/a green crosshair and a red RMR dot reticle. This Trijicon ACOG/RMR combo is flat dark earth in color. This cool optic features a dual-sighting system that 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 4 power Trijicon ACOG, the shooter has the ability to select the proper aiming solution for the situation at hand. No tools are needed for windage and elevation adjustments because the ECOS also features external windage and elevation adjusters, making it waterproof up to 11m without caps. It has a left side mounted basic iron sight. This sight is mounted to the Trijicon Quick Release Mount (AC12033). This optic comes with a lenspen and a small hard case.