Front Sight Base “F” Marked .625″

“F” marked forged front sight base M-Spec taller front sight base for use on flat top A2 receivers and .625 diameter barrels. Designed to match the height of M-Spec height rear iron sights.

The front sight base on original M16, M16A1 and A2 are shorter than the FSB on flat top ARs. The removable handle and shorter carbine sight radius requires a taller FSB to maintain the correct point of aim – point of impact.

Note: Cross pin holes are not pre-drilled.

SKU: BL-625F