Sometimes you wonder what the maker was thinking. Ive seen guns with disc set strikers that the tumbler hits the edge of the threaded disc, beating the edge over, and virtually insuring nobody will be able to remove it when it is time.
Ive removed the discs from my single gun that has them, no issues, never had a broken pin but, I have spares for when that day comes.
Ive seen two integral hammer/striker guns with broken pins, and pictures of a few others. No thanks.

Best,
Ted