The new HX line are Optisan new entry level scopes redesigned to have 25% larger field of view than most existing 3-9X40 in the market. They are built as a family of simple sturdy scope that holds most magnum centerfire calibers such as .270 Win .308, .30-06. Windage elevation adjustment comes with no-tool-required finger resettable zero feature. Duplex for shooters looking for classic simple crosshair and BCR for precise holdover marks up to 500 yards.