High Resolution Glass for Excellent Performance in a variety of field conditions. Fully multi coated optics for optimum clarity. Glass Etched Reticle with Blue and Green illumination. Water, shock, fog proof. Easy to adjust Locking Target Turrets also feature Zero Reset. Tactile elevation and windage adjustments. Low Profile Turret knobs are finger adjustable yet are sleek and compact. Solid one piece main tube construction. Hard anodized aircraft grade aluminum Body. Nitrogen Purged and O-Ring Sealed.