AR sight question

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    ShooterMcGee

    Active Member
    Dec 31, 2012
    237
    I finally received my m&p 15 and shot it for the first time. I was about 2 inches to the right with my rear sight as far left as possible. I put the gun sight side down on a table and noticed that the front and rear sights were not flush and off a hair. Is this what is causing my issue and if so, is it something I can fix or should I send it back to smith and wesson. Thanks for any advice.
     
    Dave MP

    Dave MP

    Retired USA
    Jun 13, 2010
    10,610
    Farmland, PA
    Double check the front sight post for straightness. Remove and replace the rear sight(if removable). Check mounting of rear sight for anything that might keep it from mounting level.

    Sent from my C811 4G using Tapatalk 2
     
    S

    ShooterMcGee

    Active Member
    Dec 31, 2012
    237
    Ok. So front post is straight. I took off the back sight and everything looks fine. When I put it back on, it is still out of whack with the front sight. When placed sight side down, only 3 of the 4 sight points touch. The pic below shows how far off it is. Almost the width of a credit card. Is that enough to cause the rifle not to zero?

    78C2D755-BAF9-4BD9-A01F-D76D8C7E8FCA-2476-000002A6122043C2.jpg
     
    TxAggie

    TxAggie

    Ultimate Member
    Feb 25, 2012
    4,734
    Anne Arundel County, MD
    Is your from sight a standard M-16 post built into the gas block or is it mounted to the rail?

    If it's a post, try removing the carry handle (if removable) and do an eyesight along the length of the rifle and make sure the post looks centered directly on top of the barrel. If this checks out, then try eyeballing the carry handle and confirm it's not somehow twisted or warped.

    Something like this is a little hard to diagnose without seeing the rifle.

    One other thought, had anyone else fired the rifle? If so, I'm assuming they had the same results?
     
    B

    bro

    Member
    Feb 20, 2013
    25
    have you tried that tests on different surfaces? the reference surface might not be true.
     
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