The HiViz(R) AR-15 sight is now even brighter and more versatile than ever. The AR2008 now gives you the unique ability to interchange our high intensity litepipes. The two colors included are green and red. Also Hi-Viz provided a tapered detent plunger; this tightens the engagement between the sight and detent eliminating side to side movement. The new AR-15 sight will fit all types of AR front sights ? fixed or detachable. Installation and adjustment can be done easily with the supplied wrench.