and goddamnit I fell for it again.
http://m4carbine.net/showthread.php?t=51052
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and goddamnit I fell for it again.
http://m4carbine.net/showthread.php?t=51052
It's fine... but to properly install it, you'll have to send your barrel out to have it dimpled or, as Mr. S said, have the gb pinned (which would be the better option). You're going about things wrong. Dude, we are trying to help you. We love you. That sight will not hold zero. Return it then buy a rear magpul mbus. Leave your front sight alone. Once you appropriately mount a respectable optic, you won't even see the fsb... it's kinda magical... but... not really.
If you take your fsb off and put that gb on, what are you gonna do if your sight takes a dump on you? (which I expect it will...) you'll be left sight-less.
All that work is like stepping over a dollar to pick up a dime.
Get a detachable Carry handle or a good BUIS and save your milk money and buy a quality red dot site.