NcStar 3-9X42 Compact-Red and Green Illuminated P4 Sniper/Green Lens/Quick Release (STP3942G) Bullet drop compensator calibrated for the .223 cartridge with a 55 grain bullet and illuminated Mil-Dot Reticle Reticle illuminates in Red or Green with multiple brightness setting Integrated Quick Release weaver style/picatinny mounting system Matte comes in a black finish