Origin of firing pin
Examples from the Web for firing pin
Yes, sir; it shows just a portion of the primer, and a very small portion of the firing-pin impression.
If you go through you can pick out places in the firing-pin impressions, that are similar, by yourself.
He took it from her and pointed out where it had been dented by the firing-pin.Hidden Gold|Wilder Anthony
And what about the area of the primer around the firing-pin impression?
This is the firing-pin impression you are looking at right here.