The Mark 5HD is up to 20 ounces lighter than other riflescopes in its class, giving you an advantage in the field or at the range. The Mark 5HD offers unmatched light transmission thats designed to outperform in the most challenging lighting conditions. Its glare reduction provides a clear image in harsh, direct light, while the resolution and clarity will meet the demands of any professional guide or shooter. Ergonomically designed with more tactile and audible click adjustments, larger numbers and a high-speed throw lever, the Mark 5HD is built to put accurate fire downrange faster. Features custom dial compatible; M5C3 elevation adjustment type; revolution indicator; ZeroLock adjustments; ZeroLock dial; Zero stop; motion sensor technology and night vison compatible illumination.