Last Summer I got a very rusty pistol that had to be hammered apart with a wooden dowel down the barrel. My firing pin turned out just like this one after beating the pistol into submission. I then had to use an easy out to extract the pin from the breech block. I think..had I thought it over this may have been prevented..it's been some time since I did it but mechanically it should be possible to remove a part of the toggle that cocks the pistol and this part would be saved from the forces that broke it off.