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The dissipator upper came with an 'F' marked front sight base. Those are slightly taller than the normal front sight base and are tailored for flat-top uppers and the rear sights that clamp to them.
I deliberately didn't use an F-marked sight on Linda because I was using the A1 upper. She zeroed no problem.
Most of the time a normal front sight base zeroes no problem on a flat-top. Occasionally, you run out of elevation adjustment before you're on target.
Likewise, you can run out of adjustment in the other direction using an F front sight and a carry handle.
Because the non-F and a carry handle worked fine with Linda, putting her back that way meant returning to a known good condition.
Dottie will have a flat-top and the appropriate F-marked front sight base, which should work fine.
When I, finally, get a bolt carrier group I will zero Dottie and we'll find out.
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