EoTech / Irons Issue

[argonstrom]

I have an issue with my AR & EoTech: With the standard front sight & flip up rear (I don't know the manufacturer - looks like a popsicle stick & adjusts from 200 to 800 yards), it's on target, but with the EoTech (cowitnessing), it shoots a good foot+ low maxed out on adjustment.

I bore sighted the EoTech at home later & confirmed the above (didn't bore sight the irons), put a small riser under it and got it spot on. The flip up rear is now way off.

Has anyone had the same issue? What am I missing?

[Graves]

Sounds like the FSP needs adjusted.

[argonstrom]

It would need to be adjusted to sit below its base to get even close.

[Graves]

It would need to be adjusted to sit below its base to get even close.

Is it already bottomed out?

[BadShot]

Are you trying for an absolute or lower 3rd co-witness? And what range do you have your rear sight set at? Sounds like a matech rear BUIS.



Is that it?

[argonstrom]

Is it already bottomed out?

Not yet, but it would have to be somewhere in the upper third of the "A", if that makes sense.

Are you trying for an absolute or lower 3rd co-witness? And what range do you have your rear sight set at? Sounds like a matech rear BUIS.



Is that it?

I'm not sure what you mean (probably absolute, as I was thinking the irons & EoTech should be "lined up" or atleast hitting near each other), but that's the sight - it was set at 200.