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Left windage Problem

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Unread 03-04-2013, 04:39 PM
Junior Member
Join Date: Apr 2011
Posts: 2
Left windage Problem

I have a DPMS AR 10 upper that i just mounted a Nightforce 2.5-10 vxs on with LT104 Rings . At 25 yrds i could not get enough left windage out of the scope. it consistently shot 4 inches right. I remounted the scope with Nightforce rings and again it shoots 4 inches right with my left windage maxed out. Any ideas would be appreciated.
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    Unread 03-09-2013, 10:05 AM
    Silver Member
    Join Date: Sep 2009
    Location: South Dakota
    Posts: 457
    Re: Left windage Problem

    Turn your rings around backwards and see if it switches. If it doesn't, then your rail may be out of spec.
    Pull the scope/rings off and put them on another rifle and make sure it's not an optic issue, you have all the windage you should.
    "We do not rise to the occasion...we fall to the level of our training."
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    Unread 03-09-2013, 10:14 AM
    Silver Member
    Join Date: Feb 2012
    Posts: 185
    Re: Left windage Problem

    Do what c_bass16 said. If you find that your rings and scope aren't the problem, and it is your rail, you could either get rid of the rifle or try a pair of windage adjustable rings.
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    Unread 03-13-2013, 02:17 PM
    Silver Member
    Join Date: Jul 2007
    Location: SW Wisconsin
    Posts: 225
    Re: Left windage Problem

    Or it could be the factory barrel extension/thread tenon is WAY out of wack and it just needs a precision barrel installed properly... Just a guess though. I've built quite a few AR's and the barrel extensions can have a goodly amount of runout w/ one manufacturers exception and that would be the extensions manufactured by BAT machine...they are never out more than .001" and usually half that. Factory extensions are typically over .010".
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