I was checking the zero on a G5 26 after installing a Mayhem comp and barrel this evening, and decided it would be a good time to practice alternate sighting systems. First, I turned my dot off and shot the BUIS. Then I left the dot off and shot using just the frame of the RMR. That worked fine at 7 yards but not so good at 25 yards.
Might be worth your time to occasionally work some alternate sighting into your practice sessions and see what you can do if your dot goes down.