I just purchased a Kahr P9 a week ago. Serial # starts with YA. I fired over 300 rounds, including 100 rounds of my carry ammo, and it was 100 % reliable. My question is that on the left side of the frame, just below where the trigger , there is a fairly large blemish on the frame. It almost looks like something was melted on it. It's not notiable when you look at the gun from the side. The mark is on the underneath part of the frame. Is this where they put the new pin that holds the trigger pin in place? I know the earlier P9's had a problem with the trigger pin coming loose. Is it possible that this is what this mark is and they just did a sloppy job of putting it in? I can live with it because so far the gun has been absolutely reliable, I was just wondering for my piece of mind. Thanks for any info.....stay safe