I'm changing out my rebound spring watching the Yoda G Mod video and I had this little plunger thing fall out of the trigger. It's never mentioned in the video. Do they all have it and does it just set in the trigger and contact the rebound spring housing or is there a specific grove in the trigger I need to look for. Thanks!!

Here you go:



I think you mean part # 49 ??????

Yeah, that's it. It's not mentioned that you must make sure it lines up with the rebound spring holder. Is there a grove in the trigger for it or do you just set it in the trigger and it lines up where it needs to be on it's own??

Well, I changed out the rebound spring today after polishing the spring housing and the frame where it rides. I cleaned everything and lightly oiled all touching parts. I now have a 637 with a nice trigger that I look forward to being easier to be accurate with.
The rebound spring was easy to install using a philips screwdriver.