eotech co-witness?

[KingCobra]

I am just curious if irons sights always sit this low in an Eotech. at the "2" on my KAC 600m rear BUIS the bottom portion of my Eotech cuts the little circle in half. And it almost become level with the front sight. I tried to take a photo but I can not get my phone at the same angle as my eyes.If this is normal let me know. I tried to find a photo on google where somebody had the same set-up but my google fu failed. All the photos I looked at sit higher then mine do.

KAC tuape 99051 front
KAC 600m rear
eotech 556

[BrigandTwoFour]

That's about right for mine as well.

[KingCobra]

That's about right for mine as well.

How did you go about zeroing the irons? i can barely see the front site. I have always had an absolute co-witness optic or a magnified optic so it's new to me. Do I need to take off my Eotech and zero it, then put it back on and zero the Eotech? maybe i'll stop playing with it and go shoot it tomorrow.

[GH41]

Why do so many people worry so much about co-witness anyway? Please correct me if I am wrong... The dot sight is your primary sight and the BUIS is just that... A backup sight. How many ways can the primary sight fail?? If the dot goes out due to a dead battery you have nothing to co-witness with. If a blob of mud ends up on your lens what good is a properly co-witnessed sight? If you are shooting a dot sight correctly, with both eyes open you don't see the front sight unless you are looking for it instead of looking at the target. Someone please explain it to me.

[KingCobra]

Why do so many people worry so much about co-witness anyway? Please correct me if I am wrong... The dot sight is your primary sight and the BUIS is just that... A backup sight. How many ways can the primary sight fail?? If the dot goes out due to a dead battery you have nothing to co-witness with. If a blob of mud ends up on your lens what good is a properly co-witnessed sight? If you are shooting a dot sight correctly, with both eyes open you don't see the front sight unless you are looking for it instead of looking at the target. Someone please explain it to me.

maybe I just don't have the terminology correct. I'd like to use my ****ing iron sights.

[BrigandTwoFour]

I zero the irons separately with the RDS unattached. When I put the RDS on, I get a rough zero by matching the dot to the iron sight picture, but then finalize it separately. Even the EOTech is not 100% parallax free, and you will have POI shift between the RDS normal sight picture and using the cowitness.

[Ryno12]

I assume that's an EXPS series EOTech? If so, it has a 7mm riser built in so it has a lower third co-witness. So what you see is normal. If you're after a more "centered" co-witness, you'd need the XPS EOTech.

[BrigandTwoFour]

maybe I just don't have the terminology correct. I'd like to use my ****ing iron sights.

You're not really meant to use the irons in conjunction with an EOtech. It will be, at a minimum, a lower 1/3 cowitness. Sometimes it will be a lower 1/4. You are only supposed to drop down to use the irons if you really need them.

[KingCobra]

You're not really meant to use the irons in conjunction with an EOtech. It will be, at a minimum, a lower 1/3 cowitness. Sometimes it will be a lower 1/4. You are only supposed to drop down to use the irons if you really need them.

I understand this. my main question was how i was suppose to co-witness it (for my rough zero before final zero) if i cant even see my front iron sight. but you guys answered everything.

[GH41]

maybe I just don't have the terminology correct. I'd like to use my ****ing iron sights.

If you want to use your iron sights you shouldn't be forced to look through your primary sight to use them. If your primary sight is operational why do need a co-witnessed backup sight? Please tell us why the ability to co-witness an iron sight with an electronic sight is important to you? I don't think you understand how a red dot sight is meant to be used. Try this little experiment. Turn your eotech on and put a piece of black tape over the front of the lens. Mount the rifle and pick a target with both eyes open. The fact that you cannot see anything through the optic does not impair your ability to engage the target! This is why Aimpoint uses the clear rear cap. It is not necessary to see through the optic for the concept to work. If you do NOT have to see your front backup sight why do you care if it is co-witnessed of not? If your eotech is down and you flip up your rear sight to engage a target why do you care where the dot would have been if it were working? What am I missing?