Quote Originally Posted by Big Al1 View Post
There are parts on e bay. I'm not sure if there were any differences between internal parts but I doubt it. If you have the assembly removed, I'd compare it to some of the pictures on e bay. Your FP tip may be worn down or broken. I know the pins were originally pinned in place, don't know about any newer were made, but the 99G was discontinued in about 1940so it's no doubt and older one!!
Good luck!!
I went ahead and ordered the main spring even though it didn't have the 99G listed...I looked at several models and they all had the same main spring part number. You are correct my firing pin is pinned and if the new spring doesn't fix the problem I'll order a firing pin that is also pinned on.