Weird Aimpoint T1 phenomenon

[althor]

How is the FSB mounted? I may be off here, but if the FSB is off to either side due to the barrel being slightly rotated, won't this result in what is being described by the OP?

I think I had the same thing going on with an upper that I used to have. My FSB was far enough to the left that my rear sight was ~1/8" left of center.

[davidjinks]

Did I miss it somewhere in this thread……But are the sights hitting to zero and is the aimpoint hitting to zero?

Is the only problem here the sights don't line up?

If the irons get zeroed and they hold zero, the aimpoint gets zeroed and holds zero…Where's the issue?

[WickedWillis]

Did I miss it somewhere in this thread……But are the sights hitting to zero and is the aimpoint hitting to zero?

Is the only problem here the sights don't line up?

If the irons get zeroed and they hold zero, the aimpoint gets zeroed and holds zero…Where's the issue?

Yeah this is where I am scratching my head here as well.

[G19A3]

Did I miss it somewhere in this thread……But are the sights hitting to zero (Yes, WITHOUT Aimpoint mounted anywhere on the rail) and is the aimpoint hitting to zero?(Yes, independently)

Is the only problem here the sights don't line up? (Yes, more or less, that is the issue. AFTER irons zeroed WITHOUT Aimpoint mounted, THEN mount Aimpoint. Iron does not cowitness exactly.)

If the irons get zeroed and they hold zero, the aimpoint gets zeroed and holds zero…Where's the issue? (Some zero both while BOTH are mounted. What if they NEED to QD the Aimpoint? Their irons will be off zero.)

Yes, more or less, that is the issue.

[davidjinks]

Maybe I'm still not tracking…

You zeroed your iron sights, correct? When you shoot with your iron sights the bullet impacts at POA right?

You zeroed your aimpoint, correct? When you shoot with your aimpoint the bullet impacts at POA right?

When you put everything together on the rifle and shoot it, the bullet impacts POA right?

So this is just an aesthetics issue right?

The last part of your reply is confusing. I zero my irons while my T1 is in place. I confirm the zero of my irons with the T1 in place and with the T1 detached from the upper. Out to 100 yards I've never had any noticeable shit in POA/POI.

Yes, more or less, that is the issue.