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1/4/2005 1:54:14 PM EDT
I just got my Larue mount yesterday and was messing around w/ it.  I know it raises the EO by say .25 in.  But I swear when I shoulder the gun and take aim using the irons in the same fashion I used to (pre mount) the dot is in the same place.  How can this be?  Will I need to re-zero the sight?  Seems like I would have to or it would shoot low.
Chris
1/4/2005 2:21:29 PM EDT
[#1]
If you have sighted-in BUIS, you can get a rough zero by taking a sight picture with the BUIS's and then moving the EOTech reticle until it co-locates with the top of the front post.  I do this all the time.

It can also be done the opposite way: if you have a sighted-in 1x optic, you can sight in a new set of BUIS.
1/4/2005 3:02:07 PM EDT
[#2]
I sighted in my arms 40 off my eotech zero when I switched the rear buis from dpms to arms.  Still have not made it to range after that.  Now I have added the Larue mount.  I guess what I am saying is it looks like the Eo reticle is still in the same place even though it was raised.
1/4/2005 3:03:29 PM EDT
[#3]
If the front post is centered in your rear BUIS and the EOT reticle is at the top of the post, it will be very close to sighted in.

1/4/2005 3:12:45 PM EDT
[#4]
Yes it is.  I think that is kind of weird though because it should be higher no?
1/4/2005 5:43:52 PM EDT
[#5]
When you're changing bases or "rings" for an optic, you'll typically have to re-sight in anyway.  So it could have been just chance.   For example, when I switched from a TA51 mount to the Larue ACOG mount, I needed more than 10" of correction.

However, if the mount did raise it up exactly 0.25" and didn't add any other translations/rotations, then the POI should have moved very little.

-z
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