Next we come down to the Front Sight Base (FSB). The FSB is "F" marked, which gives proper height for the flattop upper receiver that it wears. While it makes sense that these parts should match up, some manufacturers fail to do this. The Front Sight Post is the standard A2 style, which gives a notched post (4 sides) instead of the A1 style which is rounded. The sling swivel is rubber coated, which cuts down on extra noise when it moves around. Visible in the below picture are the FSB pins, which are neatly placed, and free of marring. The picture also reveals a gas tube rollpin which has been nicely installed without getting mangled during assembly.