Kutter/Chuck, I was more wondering what it was that kept the pin from coming out of the recess. I just assumed that the pin had to be retained. When the side plate is on and uncocked, the hammer is right up against the face of the pin recess. When cocked the face of the hammer is back from the recess about 1/4". Looking at the shape of the recess with the large diameter section only being 3/16", I wouldn't think you'd want that coming out of the recess.
Chuck, just thought there was always a spring. However I was on the LC Smith forum and I read about pushing the pin in before closing the barrels or pointing the gun up and shaking it. Also read about the pins falling out during disassembly.
Thanks
Kirk