I just purchased a 9C that comes with 2 10 round magazines, will the 12 round magazines also work with this gun? This is my first S&W(have a full size PX4 9mm) and I am excited to try it on the range. Are there different versions that have a magazine disconnect or not or other variations? thanks

12 round will work. Full size 17 round will also work.

Mine also came with the 10 round mags. It was the only one I could find. 10 round means CA compliant. 10 round and a heavy trigger are MA compliant. I believe I got that right.