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2/21/2011 6:46:15 AM EDT
I got my flat top upper in this morning and mounted the red dot I got for it.  Its a low end scope, a leapers cqb, and it came with mounts/rings.  When installed it doesnt co-witness the A2 front site so I'm guessing they are low rings and I need higher ones.  Which mount type is the correct one? Ive seen medium and high.

thanks!
Shane
2/21/2011 6:53:17 AM EDT
[#1]
http://www.ar15.com/forums/forum.html?b=3&f=18
2/21/2011 10:25:47 AM EDT
[#2]
http://www.ar15.com/forums/forum.html?b=3&f=18


I knew there was an optics forum.  I thought, since this is the new build forum, that this was something that would get a quick answer instead of having to read hundreds of posts for a 5 second question.  I'm pretty sure typing in the answer would have been just as quick as posting that link, but hey, thanks.  yeah...


2/21/2011 10:27:56 AM EDT
[#3]
Plenty of rings to choose from. Go to Primary Arms and get yourself a set of $30 med or high rings. They're designed to offer an absolute or lower 1/3rd cowitness with A2 irons.
2/21/2011 10:29:49 AM EDT
[#4]
Do both medium and high put the red dot at the top of the front post?
2/21/2011 10:34:31 AM EDT
[#5]



Medium rings should be absolute, high should be 1/3rd. Dont quote me on this- ask Marsh and his crew before ordering.



 
2/21/2011 11:45:50 AM EDT
[#6]
Thanks Nighthawk!  Thats a great graphic.  In my limited experience with optics I've always used absolute co-witness (didnt know the technical term, i just called it "lollipopping" ).  

The other form is interesting because it helps clear your field of view, but without the post as your reference how do you know you're dead on target?  Sorry for the very basic questions, I've almost always gone with iron or scopes without any co-witness.



Shane
2/21/2011 12:44:53 PM EDT
[#7]
Quoted:
The other form is interesting because it helps clear your field of view, but without the post as your reference how do you know you're dead on target?  Sorry for the very basic questions, I've almost always gone with iron or scopes without any co-witness.


That's how red dot sights work - no need to align multiple aiming devices.  Put the dot where you want the bullet to go do.  On optics like Aimpoints, cheekweld doesn't even matter.
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