I've been thinking about a C9A1, but I just took the time to compare an M9A1 and an S9A1 side by side, and I was left wondering why? The S9 slide is just barely shorter than the M9... but the shorter grip makes it much easier to carry concealed. With the full sized grip and almost the full sized slide, I don't see why the C9 makes that much sense... why not just stick with the M9A1? I have never actually handled one, so maybe I'm missing something here. Someone unmuddy the water for me!