Best 9mm pistol caliber carbine?

I own a 45 ACP PCC. The things I like about it is is that it is a fantastic suppressor host. It is pretty accurate. It has very little recoil. If used in a Self Defense setting you could accurately and quickly operate the PCC.

It is has a lot more value then it is "fun to plink with."
What brand? Pic? What mags does it take? I've always wanted a .45 pcc, just haven't found a decent one when I was ready to buy over the years.