The AR-15 M16 and M4 A1 and A2 Front Sight Adjustment Tool features four-and-five-prong tool to allow adjustment of front sights on AR-15, M16, and M4 rifles equipped with either A1 or A2 sights. The 4 & 5 Prong Front Sight Adjustment Tool for A1/A2 rifles and carbines is constructed from high-quality steel.