I have a TCP 738, SN ends is B. Recently it has an issue with the trigger not dropping correctly. From the half cocked position, pulling the trigger, the hammer pulls all the way back, but then does not drop or hesitates before dropping. If it hangs, it will drop as I release the trigger. Not consistent, and I keep my guns very clean. It does not happen all the time either. I have quit carrying it until I can resolve the issue. Anybody heard of this before? Any suggestions appreciated.