NcStar 3-9X42 Compact-Red and Green Illuminated Mil-Dot/Green Lens/Quick Release (STM3942G) Open Target Turrets allow for quick and easy adjustments for windage and elevation with fully multi coated lenses Built in sunshade helps prevent glare on bright days and quick focus eyepiece allows for a clear, crisp view of your target Bullet drop compensator calibrated for the .223 cartridge with a 55 grain bullet and includes an illuminated Mil-Dot Reticle Reticle illuminates in Red or Green with multiple brightness setting Integrated Quick Release weaver style/picatinny mounting system comes in a matte black finish