It had to happen sooner or later. For this old snubster, it was later. I bought it in '81, I think. I've been getting it hot and dirty quite a bit lately and it finally snapped of and swedged itself into the hole.
I haven't messed with it yet, thinking I might get some advice here. I'm concerned about trying to knock the broken pin back out of the hole because if it doesn't go the first coupla whacks, it might just get schmushed in there worse.