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Any standard rear sight should work. I'm assuming you're talking about the variance between the A2 FSB and "F" Marked FSB, my suggestion would be to try it first. It may zero just fine. Rear sights are all designed for "F" marked heights, with the possible exception of the Bushmaster detachable carry handle (never owned or examined one), however, due to what's sometimes called "tolerance stacking," are not always necessary. If you can't zero properly, however, you can order Bushmaster's tall front sight post, which does the same thing the "F" FSB does, raise your point of aim. It was the original solution before the introduction of the M4 Carbine and M16A4 to simply include a taller front sight post. Ordering one should not cost you more than would be covered by a trip to McDonalds, or skipping Happy Hour one day at the bar. HTH, ~Augee |
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