butlersrangers wrote on Feb 5^th, 2020 at 5:02pm:

Wow, That is different! It looks like someone had a mishap and used misdirected force in trying to remove or replace trigger-pin, that holds trigger and sear together. .... Or possibly tried to compress 'flanges' on trigger to eliminate side-play of sear? Crazy Bubba!

AH, BR that was me! 45 years ago there was no internet or KCA for looking stuff up. You mentioned a couple of years ago the trigger pin was tapered. The light bulb went on then as to why would that ear break off like that when pushing the pin out.
With the trigger detail just included in this thread we can now know the small side was upset by SA. With a trigger assembly in hand you measure both sides and you think it is a straight pin that can be tapped or pressed out from either side. 50/50 chance of getting it wrong unless you look it up on the KCA.
Today if one had a trigger assembly than needed to be disassembled one could file off the mushroomed left side and push it to the right. When reassembling if the pin was too short Grandpa's has new ones.
The case hardening on those ears went all the way thru so they are brittle and break easily. My point was with almost 500,000 units out there are at least a few that could be acting up because of a partial break. The only source for used gun parts that I knew of back then sent me that junk trigger as a replacement. Others may have done a brazing repair or some other improvised fix.

Knowing what I do today the only reason to disassemble one would be if it is full of polishing compound from some one that blued it.
Do I need to change my screen name to Crazy Bubba?:-)