Spring-loaded flip up iron sights can be easily activated from the push button. Machined from lightweight and extremely durable aluminum, Mil-Spec hard anodized., Equipped with green and red fiber-optics for increasing visibility. Accuracy is enhanced when speed is involved and easier to quickly get on target., Unique design tool-free adjustable front sight. Elevation of the front sight post can be easily adjusted by the built-in screw. Also, the windage of the rear sight is adjustable from the side screw., Two aperture options offer a rapid transition from CQB quick target acquisition to precision long-distance aiming., Provides the same height-over-bore as standard A2 irons, clamps to most any Picatinny/STANAG rail.