On my 1916 Erfurt, there is a spring steel piece that rides on the exterior top of the trigger plate. It is pinned to the frame, I have not been able to find it identified on a parts diagram. I have, however, found it on some photos.
What is the story with this part? Sorry - no pics but one like it can be seen at:
http://forum.lugerforum.com/showthre...urt#post174689