The Diamondhead USA Integrated Flip-up Front/Rear Sight Sighting System features the Diamond-shaped apertures and upper housings for faster target acquisition & centering. Designed for use with AR15s and Modern Sporting Rifles. Made from a black anodized 6061 T6 aircraft aluminum for?strength and durability. The sights flip up quickly and stay securely in place when deployed or when folded flat. Dual same plane long and short range apertures at exact same height as factory A2 sights. The front sight accepts all standard A2 front sight posts and the rear sight has an easy to adjust 0.5MOA windage adjustment.