I've owned a Kahr K40 (all steel, blued, and .40 S&W, of course) for almost 2 years, and frequently carry it. It has a full-size grip, the curves of which are patterned after the classic Browning HiPower. The magazines hold 6, plus 1 in the chamber.

It's very accurate, carries & conceals well; I like it.

A friend just bought a P40 (polymer frame version of same gun); it's lighter, but other than that, the same. He also had a KelTec .40-cal. He said he didn't like it nearly as well as he did the new Kahr. Also said the KelTec was not as accurate, and recoil was much worse. (Not knocking KelTec--I also carry their P32!)

The only problems I've experienced with the Kahr were in trying to change the sights--I broke the factory front while attempting to drift it out. I saw the error of my ways & had a local gunsmith complete the job for $20.
The other "issue" has been finding a spare mag carrier that fits a single-stack .40 mag. While I know I can order a "custom" one from Kramer, or another holster maker, I'm a cheapskate...er, ah...very frugal...and prefer to shop around.

In other words, no problems experienced with the gun.

HTH YMMV LSMFT,

David

LSMFT? Unless the meaning has changed, you must be as old as I am.