They are G-17 MOS Gen 5 pistols using our mounting plates. No issues noted after thousands of rounds. I do some extra attention armorer stuff on plate mounting though. I thoroughly degrease the screw holes in the slide and the screws themselves and let them dry. I then use some Loctite 242 (blue) on the screws and snug them down really well. Let the thread locker cure for 24 hours before shooting and you should be good to go.