
Since getting it back from Pk, I've had it out 4 times. The first time it functioned as it always had, flawlessly. The second time I took it out, it broke an extractor. OK, that's just one of those things that can happen. I ordered another extractor and with advice from PK (who's always willing to help) I managed to remove the broken extractor and install the new one.
I took it out again to test the new extractor and noticed that the trigger felt like it had some additional activity going on during the trigger pull. It felt as though the trigger mechanism would occasionally catch on something, or was experiencing some increased friction. I took it apart at the range and could see the new work done by PK, and nothing looked broken either on the Kahr or PK parts. I fired a few more rounds and was at least satisfied with the extractor, but the trigger was making me a bit anxious.
When I got home I planned on taking it apart for cleaning and further inspection. I'd left the bolt locked open from the last fired round and so I released it and attempted to pull the trigger. The trigger wouldn't budge. It was locked in place solid. Have you tried to disassemble a semi-Thompson with the hammer cocked? I don't think it can be done! Here I was with a jammed trigger and no way to disassemble the gun to see what was wrong. I struggled with it for a few hours and gave up.
Picking it up a few days later, I decided to give it a try. To my surprise the trigger pulled and released the hammer. I field stripped it and again could see nothing wrong. After cleaning it I reassembled it and the trigger worked fine.
Took it out to the range today and it was again performing flawlessly and went through 50 rounds with out a hiccup. I loaded up a fresh mag and attempted to fire and the trigger wouldn't budge. That's when the cussin' started. Not knowing what was wrong I cussed Kahr and then PK and then Kahr and then PK and then PK and then Kahr. I took it down again and this time I caught a glimpse of something moving down inside the lower assembly behind the trigger. I held it upside down and started bumping it with my hand and out fell the front 1/4" of the broken extractor which I had assumed was ejected out of the gun when it broke.

My apologies to Kahr and then PK and then PK and Kahr. At least nobody was around when I was cussin'. The 27a1 functioned flawlessly the rest of the day.