Getting back into shooting more consistently now, right as the "north facing" ranges are going to be shut down until end of Sept. . .
Was able to hit the bullseye range this past weekend and changed battery on two of my RMRs and rezero. They are essentially the same Glock 19s, different models from the same builder. One RMR was fine after battery replacement, and the other needed some adjustment. Might have been rust showing, as the gun that needed adjustment was the first I shot for the day. I seemed to get into a groove and things tightened up after a while.
Some highlights:
1) I was surprised at the amount of crud that I found under the optic, above and below the RMR seal plate. I think mostly range dust and stuff. I have shot these pistols in a number of classes and training, but I was still surprised as how much crap got under the body of the RMR.
2) I checked the set screw on the rear sight of both guns and the mounting screws for the RMR prior to hitting the range. The set screw of one of the guns wasn't tight. The RMR mount screw on one side of one gun was a little loose, or I could tighten easily. Not worried about the set screws for the rear sights as I fitted the rear sights pretty snug and takes a decent amount of force to drift the sights. However, the RMR mount screws is something I'll have to watch. The screws I used for the initial install had some thread locker applied from the mounting screw supplier, but I am guessing it broke down. After changing the battery and zero-ing, I put witness marks on the RMR mounting screws and the elevation and windage dials.
3) Seeing a LOT more pistols with RDS at the range lately. Great to see. That said, I also will need to be sure to put in more time shooting irons along the way as well.