Extreme sighting speed and superior long-range accuracy just two of the advantages these riflescopes add to your AR platform. BDC-600 reticle has open-circle aiming points and hash marks from 100 to 600 yards. It is equipped with tactical-style turrets and zero-reset feature to simplify field adjustments. Fast-sighting Carbine reticle option was developed specifically for fast-handling shorter barrel ARs and 3x32 and .223 Remington cartridges to engage targets out to 600 yards. Fully multicoated optics deliver extreme brightness and up to 98% light transmission. Generous, consistent eye relief. 1/4-MOA hand-turn, tactical-style turrets. Nitrogen filled and O-ring sealed for waterproof, fogproof performance.