I found one just today and put a deposit on it, the 9mm version. I think this will be a much handier rifle for HD than even a short barreled AR. Much easier to limit penetration with the proper ammo. Feels almost as handy as an MP5.
My 9mm LOVES Speer Gold Dot HP 124gr. i have tried other brands and they have not had the same results. I know that is a bit vague, but I don't remember the brands. 25yds - shootin' quarters. 100 yards - if you aim at it, you'll hit it - exactly where you are aiming! Definitely get the extended magazine grip plate or magazine extender(don't remember the exact term right now). The standard mags that come with it sit deeper then the grip with a very small area on the sides that you can actually touch. You need to be aware if the mag has seated properly. It is a little annoying to have to push a mag up into the grip.