A comparison picture couldn't hurt, although I am pretty sure I have a good understanding at this point. It would certainly help someone figure it out faster for future reference. As I noted in my first post here, Google found this thread for me, so anyone who may be looking for this info in the future may very well find themselves here too.

I went back to my local store tonight, they had a 9c without the extension, and a 40c with one, so I was able to handle both and really feel the difference. I liked the extension a lot better than without, but of course, that was just in a couple minutes, and no shooting.

I had just about decided on the 9c, but now I'm having second thoughts on the 40c. But of course this is not the thread for that discussion!

I already have a full sized M&P 40, and I really like it. It's just a bit big for concealed carry.

Thanks again!

TFred