FRONT SIGHT ADJ TOOL, (4 PRONG)

FRONT SIGHT ADJ TOOL (4 PRONG) - M16A2, M16A3, M16A4, M4, M4A1.
Used on all 4 position front sight posts. (Square)

M16 and M16A1 use the 5 position front sight posts. (Round)
Different tool required.