Front sight tool For adjustment of 4-Prong A2 front sights One-piece precision machined steel part Patterned surface for easy & friendly use Easy precision elevation adjustments for standard 4-prong front posts Steel 1.6 oz Adjust your gun's front sight with the help of this front sight tool by UTG. This one-piece, precision machined steel tool is capable of adjusting standard 4 prong A2 front sights and has a patterned surface for ease of use. Steel, black.