Trying out the Magpul Pro offset sights today and the PoI at 50 yards is 9" right, after I have maxxed out rear sight adjustment to the left. I have some confidence that the sights do shoot consistently as I have a 10 shot 2" group, but 9" right after all adjustments. The upper is Aero and the handguard is a 10" Centurion C4 quad rail. I did not have a problem with the previous BUIS.

Should I shim the right side of the front sight, the left of the rear, both? (I am not going to file off material from the rails.) Any other ideas? WECSOG whack the front sight rightwards with a hammer?

Any suggestions?