Are the first two pictures the top of the chamber hood?
If so it looks like it's peening and might warrant a trip back to Kahr. Haven't seen that in a long time.
I had a K40 that did that, ended up with a new barrel and slide.
Chime in Greg, I could be way off as usual.
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."