The Diamondhead USA Diamond Front Combat Sight features the Diamond-shaped upper housing 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 sight flips up quickly and stays 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.