I have a G19 outfitted with an Optima and don't find it any more forgiving than an Aimpoint. With my arms extended in my shooting stance, I only need to deflect the pistol about two degrees to make the dot disappear (when it was previously centered in the window).
Here are my experiences with it in Todd's Aim Fast Hit Fast class:
https://www.m4carbine.net/showthread.php?t=36612
And when I got back I was discussing the issue with someone else. Here's an animated GIF I made to show how little deflection is needed to make the dot disappear.
The presence of tall irons should definitely help with tracking the pistol through recoil, but unless the Doc sight is significantly different in terms of optics, I still think you'll lose the dot. I know it is significantly different in terms of housing, but isn't the window still about the same size?
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