I just picked up a nice 1921 M94 SRC, the ladder sight is there but missing the slide and retaining screw. I have found reproduction parts and entire original sights but no original parts, figured I'd try here.

I need the slide and small screw.

Found the slide and screw, now I need a new ring for the stud. They are available new on Ebay but going to try to find an older one to match the gun's "patina".

Any tricks to installing one? I imagine it's opened by twisting until open enough to get through stud and closed up?