HIVIZ AR 15 Interchangeable Fiber Optic Sight Fits: AR and M4 rifles with a frame or folding front sights Color: green Interchangeable style AR15 Interchangeable Sight Includes 4 LitePipes 2 red 2 green Sight adjustment tool tapered detent and carrying case for spare LitePipes Fits AR and M4 type rifles with A Frame or folding front sight HiViz recommends gunsmith installation for all dovetail sights. Due to manufacturing tolerances, some firearms may require additional fitting.