Just an update, at present, I have attached the mount to a AK74, which had the least flexing of the rail. I zeroed an Aimpoint Comp M2 last Week @ about 26 yards. It wasn't very far and I was shooting prone, with a Hoppe's rifle rest. I was just plinking, not trying for a tight group, but to adjust where the round impacted.
I then brought the gun home and completely dissembled for cleaning, and removed the Aimpoint from rail. Checked the set screws and everything was secure. I re-assembled the rifle, and shot it this past Thursday.
First 3 shots, the impact of the rounds shifted to the right.
I fired a 6 more times to develop a pattern.
Then, I stripped the rifle down again and re-assembled.
Then, I fired a 30 round magazine slowly and the hits shifted to the right even more.
Maybe it's my sight picture, so I will go for round two, and re-zero and see what happens.
I purchased another AKARS for test fitting and it has the same rail flexing. I haven't messed with the AK47 it's on yet.
I still haven't heard from PA, about the rail issue.
Edited to add, the ammo was your standard 7n6