FYI and if you didn't already know: I tried my G19X in my Micro RONI with stabilizer brace. The problem I had, which I didn't with any other of G19s, is that when the slide locks back, the slide release on the RONI does not affect the G19X's slide release. One problem with this is, if the slide is locked back, one may not be able to remove the pistol from the RONI chassis. The other problem, that if your slide is stuck back, the weapon is a paperweight at that point. My advice, based on my very-limited experience with mixing these two systems, is that I would not advise. If I am known to be incorrect, please clarify what the issue with mine could be. It took me 5 minutes and luck to activate the slide release once the slide got stuck back. The G19X slide catch is, of course, different than that of the Gen 3 G19.