What's a 9mm subcompact? I'm not sure there is such a thing unless it's the worthless Kel Tec. I certainly wouldn't call a Shield or a Kahr a subcompact.
How about a Kahr PM9?
I've never held the Kahr and Kel Tec in each hand and compared them that closely. Just informally, the Kel Tec
seems enough smaller to almost put it in the subcompact category, but I could be mistaken. Just informally, the size in descent seemed to be M&P Compact, Kahr PM9 and Kel Tec single stack 9. I got rid of my Kel Tec both because it wasn't reliable and it didn't seem to be a lot smaller than the M&P Compact. It does seem a bit smaller though.
