I had a Kahr P9 for a while, which went back to the factory several times. It had problems with premature slide lock, failure to chamber, failure to lock the slide back, trigger pin walkout, and failure of the trigger to actuate the striker.
In my case, Kahr DID pay shipping both ways every time it went back and ultimately replaced the gun, but I traded the replacement - unfired - for a Glock 26. The G26 isn't as nice a package, but it has the virtue of actually WORKING no matter how I shoot it - upright, sideways, upside down, limp wrist with loose grip - it just plain WORKS.