Thread: ar15 gas block
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Old February 27, 2012, 10:52 PM   #14
DnPRK
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Join Date: August 24, 2001
Location: LC, Ca
Posts: 1,760
If you plan to install a free floating rail, you will need to completely remove the front sight base to swap the barrel nuts. This means the existing front sight pins will have to be driven or drilled out. Failing that, you'll have to cut the sight base off.
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