Richard. does this gun have bushings in the receiver front to house the firing pins? If so then they are the wrong prints. The bushing is 5/16" x 32 threads, and on some there was a tiny copper set screw and I am not sure of the size as I couldn't get mine out but nothing was broken.
firing pin for bushing type:
There was never a spring used in any L.C. Smith to return the firing pins, the hammers rebounded after firing and the firing pins are supposed to float. Unburned powder, dirt, etc. cause them to stick and possibly get broken upon closing, or just worn out.
Second post, not sure of screw size, maybe a 6 series, but I'm sure a common size.
Send me an email with the pictures, email address is next to name.