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AR Sight Misalignment

Discussion in 'Rifle Country' started by johnmcl, Jul 15, 2007.

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  1. johnmcl

    johnmcl Member

    Joined:
    Apr 1, 2005
    Messages:
    1,822
    Location:
    Northern VA
    Hi all,

    So I'm zeroing in an AR and discover that the windage is way left when all is done. (Nice groups by the way).

    This seemed out of balance to me, so I dropped a pair of levels on the front sight base and the carry handle. I leveled the rifle so that one bubble was between the lines and sho' enuff the other one was a half bubble off.

    Take a look at the attached photos.

    Any advice for the corrective solution? Has anyone had a similar experience? While I can live with it as is, I'd prefer the maximum adjustability for those windy days at long ranges.

    Thanks in advance,

    John

    rear aperture.jpg

    rear aperture with level.jpg

    front sight.jpg
     
  2. DMK

    DMK Member

    Joined:
    Dec 24, 2002
    Messages:
    8,818
    Location:
    Over the hills and far, far away
    The front sight is canted very, very slightly to the left (less than one degree). You could reseat the barrel to correct this, but you might have to make a few swipes with a file in the alignment slot on the receiver to do it. Not worth the trouble IMO. It won't cause any functional problems unless you have a strong wind from the left side

    Ignore the fact the the sight ears aren't level. They aren't a critical dimension and are often slightly different heights.


    Edited to add: It could be the front sight post is out of spec or bent. Shoot a five round group then turn the front sight post two notches and shoot another group (ignoring the elevation change). See if the group moves to the left or right (diagonally). If it does, turn it back to the starting point and repeat one more time. If it still moves, replace the front sight post.
     
  3. Gary G23

    Gary G23 Member

    Joined:
    Jan 1, 2003
    Messages:
    1,451
    Location:
    Corvette City
    Common problem when the barrel is over-torqued. As long as it will zero I wouldn't worry about it.
     
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