If so, a picture of the underside of the bolt would be greatly appreciated.
A co worker has asked me to help restore his grandpa's. It is missing the firing pin and what I am guessing to be a very small, cone-headed screw that is probably used to retain it in it's slot in the bolt. There's also a slight indentation that might indicate that the screw should also be holding in some kind of plate, but that could just be a dent or machining error.
The Numrich website has a rather poor, 1930's-'40's era diagram of the parts that does not show their relationship to one another, and it does not appear to list anything that would be the screw.
Any more detailed pics or links would be a huge help. Thanks!