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Ok, possibly dumb question regarding absolute vs lower 1/3 co-witness

Posted on 7/15/16 at 11:27 am
Posted by DarthTiger
Member since Sep 2005
2746 posts
Posted on 7/15/16 at 11:27 am
(no message)
This post was edited on 1/10/21 at 1:14 pm
Posted by BM7133
Raceland, LA
Member since Feb 2006
1186 posts
Posted on 7/15/16 at 11:40 am to
You zero the dot and irons independantly. When the dot is zeroed correctly it will be higher than the irons when looking through the optic since they will only be visible in the lower 1/3 of the scope/optic. I stumbled over the terminology in this response lol
Posted by Ace Midnight
Between sanity and madness
Member since Dec 2006
89566 posts
Posted on 7/15/16 at 11:47 am to
It's not a dumb question, because it is confusing. If you recall that the terms are differentiating between 2 things, neither of which involve actual "zero" - despite any misconceptions.

The first is mounting of the optic compared to the BUIS.

The second is the sight picture when using the optic.



For any sight to be zeroed, that sight has to deliver a bullet to a mark (assuming correct sight picture, alignment and other fundamentals) at a predefined distance. There is no "Kentucky windage" or anything like that at the zeroed distance. Zero is zero.

Hope this helps.
Posted by DarthTiger
Member since Sep 2005
2746 posts
Posted on 7/15/16 at 11:49 am to
(no message)
This post was edited on 1/10/21 at 1:14 pm
Posted by Carson123987
Middle Court at the Rec
Member since Jul 2011
66441 posts
Posted on 7/15/16 at 12:16 pm to
Your dot has its own zero and the irons have their own zero.
Posted by DarthTiger
Member since Sep 2005
2746 posts
Posted on 7/15/16 at 12:44 pm to
(no message)
This post was edited on 1/10/21 at 1:14 pm
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