If you go with a gen 5 23 the slide is also wider then the 19 and older gen 40s. So if you already have kydex holsters for the 9/40 glocks they likely won't fit it. I used mine in a 20 holster until companies finally started releasing holsters for the gen 5 23I have a butt ton of .40, but it’s only use is for practice ammo for my Smith 610. Having another pistol that can use 40 is appealing. F I’m reading things right, the g23 is exactly the same as the 19, with the exception of the magazines, barrel, and slide cut to work with a .40 barrel, right? All I would have to do is swap out barrels and mags and I would essentially have a 19?