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AR15.COM
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2/13/2013 12:55:41 PM EDT
I have a F marked front sight housing without a post, what height post should i buy?
2/13/2013 1:20:37 PM EDT
[#1]
The difference between a "F" fsb and a standard fsb is about 4 thousands. put what ever post you have  in it

BTW I googled this....you can too
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