Thank you for all the comments.
I took some measurements with my calipers and agree that it seems the screws are bottoming out before they are locking down on the optic.
I think the epoxy is still an issue since I don't want the screws locking down on epoxy rather on the counter bore of the screw holes themselves.
But one issue at a time. I contacted Agency Arms with the picture and my observations.
I would assume they know about the need for shorter screws for the EPS optics and can just send me new ones ASAP.
This is quite frustrating.
But it will work out eventually.