Made of Dupont™ Zytel® High Performance Reinforced Polymer for a both durable and lightweight construction. The EBUIS consists of a low-profile, snag-free design that is unobtrusive when flipped down. Aggressively textured surfaces allow for a slip-free, positive operation under any adverse conditions that may affect grip. Large and small apertures on the rear sight are available for either close-range, rapid, sight picture acquisition or long-distance precision shooting. Windage adjustments can be found on the rear sight and elevation adjustments can be found on the front sight.