Glock 43X is the smallest 9 that I own, and it's reliable.
I can say the same for my original Glock 43. I've fired it extensively, and have never had a failure of any kind. That said, if I'm looking for a compact 9mm, what I carry is my Glock 26, since it's just as easy to carry and conceal as my Glock 43, and when I need something smaller, I generally go with my Glock 42 (.380 ACP). That usually leaves out the Glock 43.
