Tell me a bit about these pistols, please? I know the 9mm Gen 4's had serious ejection problems, was this ever a thing with .40 or .357 models? I have an RCS Eidolon holster that I bought for G19X thinking it would fit but the ambi slide catch is in the way as these were designed for Gen 4 Glocks. So I'm looking for a gun to use in this holster and don't have .357 currently, figure why not just because you never know...