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AR15.COM
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12/4/2009 2:12:19 PM EDT
What does an "F marked" front sight base mean?  I have done a search and can't find an answer.  Let the flaming begin.
12/4/2009 2:15:01 PM EDT
[#1]
its about 1/16 inch taller than the non f marked front sight. Works well with carbine sized weapons.especially if you use 50 meter zero.
12/4/2009 2:17:55 PM EDT
[#2]
+1 Bump
12/4/2009 2:20:08 PM EDT
[#3]
Without getting overly complicated (you're a new guy...you'll get better with all of this info)..."F" marked FSB are correct for flattop weapons. It is *slightly* (see post above) taller than an A2 (molded carry handle type) height FSB. Almost any AR type rifle you buy will/should be equipped with an "F" block.

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