Re: Kahr k40 vs ?
That 239 is fine little gun.
The GF has a sig p238 that we both like a lot. The kahr p380 is a very nice pocket pistol as well.
Kahr p380:
Great sights, little recoil, great fit and finish, very accurate, light weight, DAO, great for concealment. Decent aftermarket support as well. It was very tight from the factory and did take a while to break in (400ish rounds), but after that it has run like a top. I have it in my pocket right now.
Sig p238:
Great sights, little recoil, great fit and finish, PRETTY, SAO, plenty accurate enough but I shot the kahr better. GF shot this one much better. Slick running slide, very easy to rack. Ran great from day one. 700 or so rounds fired, maybe 2 hiccups that were probably shooter induced.
Note both little 380s do well with recoil spring replacements much quicker than full size weapons. Form is also very important as they are fairly easy to limpwrist, especially the kahr.