Welcome to the forum nick54. I just ordered one of these myself. They are a limited run of new compacts that have been previously discontinued for some time. Rumor has it this was a canceled overseas contract that has been made available in the states. Virtually identical to the full size 92 FS other than it is shortened in the slide/barrel and grip length. I can't tell you the mag number as I don't have mine yet but they are relatively common and affordable through a variety of sources. It will accept the full size 92 mags as well although they will extend a bit below the grip.
That CT grip, if it is for the full size, will not fit the shorted compact grip. Due to their discontined status I would be surprised if a crimson trace grip were available for them but it would be worth checking into directly. Not sure how ameniable those grips are to cutting and customizing to fit but that might also be an option.
I'm pretty stoked about these. I have seen the occasional 40 S&W used or new on the gun show tables but never a 9mm let alone brand spanking new Italian made. This is a classic get them while they last situation that might not be seen again. I couldn't resist. Good luck with your decision.