Start with excellent edge-to-edge sharpness and add a first focal plane, illuminated reticle for fast reads at any magnification and lighting situation. Add in RevStop Zero System for a reliable return to zero, and locking turrets for fast, stay-put adjustments. Build it around a 34mm tube that accommodates massive amounts of elevation and windage travel, and a throw lever for rapid magnification changes, and you've got a long-distance impact machine that'll have you wondering how you ever shot without it.