Leapers UTG AR-15 Front Sight Tool for all versions of the AR-15 / M16, rifles including the AR-10. Two-in-One sight tool with dual functions to adjust both 4-prong and 5-prong front sight. Adjusts front sight elevation for both A1 and A2-style weapons. AR-15 / M16 A1 Front and Rear Sight Adjustment Tool four and five prong tool allows adjustment of front and rear sights.