NcDe .223 556 AR A1 A2 Front Sight Tool Carbine Dual with 4-Prong Double ended Adjust Elevation of either 4-Prong or 5-Prong A1/A2 Front Sight Post. Quicker and easier to push that pin down and adjust the front post, adjusting the AR style front sight. With this tool you could get the adjustment necessary to properly get front sight in alignment. Easy to hold on to due to the patterned textured grip surface,precision machined steel part. New Gen, Double ended Adjust elevation ( 4 prong/5 prong ) AR front post adjusting tool.