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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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