Glock 27 for sure, it might be a little thick compared to something like a Kahr, but it is a subcompact service pistol, the Kahr is great and all but I really don't think you can count it as a service pistol. The Glock also shoots like a service pistol, better even than pretty much any of the fullsize pistols I've shot. It's a champ, and it isn't really all that thick, and it is very small. In a good thin holster, it carries like a dream. I used to use a FIST #1AK, it was ideal. never carried a better combination of comfort and capability.