AR iron sights and red dot option

[wpod]

I hate to sound stupid buuut, would someone explain cowitness to me?

Thank You

There are no stupid questions.
Co-witness is when the dot in the red dot optic aligns with the front and rear iron sights.
Absolute co-witness is that alignment occurring in the center of the optic.
1/3 co-witness occurs in the lower third of the optic.
For some, this is beneficial in that if the red dot stops working, the shooter can still use the iron sights through the (not-illuminated) optic. The optic is not in the way.
This is usually done with flip-up sights, front can be a fixed sight.
I like 1/3 co-witness in that it leave more of the optic uncluttered with my fixed front sight.

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[steel30]

I hate to sound stupid buuut, would someone explain cowitness to me?

Thank You

When you line up your red dot to your iron sights.

[Ubermcoupe]

Newbee questions here.

Getting used to my AR build with Thorston stock and buffer tube and Aero iron sights. Having trouble getting my cheek into the right spot for a good sight picture. I am really pushing up against the bottom of my ear protection and into the cheek to get a good alignment.

Do red dot sights sit higher than steel sights, and would that help with the above?
Thanks.

It might be cheaper to change our your earpro for something more conducive to shouldering long guns.

Personally speaking, I have my AR set up to run 1/3 cowitness aimpoint and I wear these jumbo outer ear things with plugs inside.

[Sicarius]

I personally like absolute cowitness. My head stays in the same location regardless if I am using a red dot or irons.
Kevin