Started this long ago and finally got around to making a firing pin. It's a 1916 Spanish mauser, made in 1923, that had almost immeasurable setback. No thumb notch which is always a pleasure to see and fairly rare for that modification. I have these FN bolts from Sarco that are incomplete so I welded the aft end on to the cut-off '16 bolt. Had to weld a little stub on the port side of the bridge to actuate the shroud plunger and prune the tang a bit for clearance. None of this was difficult. Making a firing pin took some time. When you glance, it's easily mistaken for a SR Mexican but it's smoother in operation. A Mexican firing pin would have work just dandy by shortening but I didn't have a spare and they are like hen's teeth to find in the wild.