I've never heard of any gun actually having an end of life. This would be a question for Kahr customer service but I would say that they would replace it "if" it was still under warranty.
We have one member here with many thousands of rounds thru his PM9 and still shoots and looks new.
I don't recall and he hasn't been active for quite awhile but I think it was like 40,000?? Maybe some of the others remember, maybe I'm way off too.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."