Originally Posted by
Low Drag
OK, so what's the "F" marked FSB?
I ordered one of these uppers from you a week ago.
What rear sight have you had good luck with mounting on a flat top?
I'm going to get some kind of 2X optic for it and not sure what one yet so the iron sights will simply be a back up.
The F front sight base is the 'correct' height front sight base when using a flat top upper. With the F FSB you won't have the issue of the front sight post nearly falling out to zero it.
Rear sights that work well with flat tops are LMT, Larue, Troy, KAC, ARMS, RRA Dominator, RRA stand alone, DPMS, GG&G, etc. as long as you're using the correct FSB (F marked when using a flat top).
Chief Armorer for Elite Shooting Sports in Manassas VA
Chief Armorer for Corp Arms (FFL 07-08/SOT 02)
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