While that is an interesting concept, I personally don’t think they could be site adjustment tools. I’ve worked on and handled a great assortment of vintage and modern military firearms (a friend of mine was a class 3 dealer and class 2 manufacture) and have never seen a site tool that looked like this. Also the pins on the shin tool and raw metal, with no indication that they ever had a blued finish. Considering that the pins haven’t rusted, it would lead me to believe they are stainless or some form of alloy.
I’m still thinking they have to be some sort of cotter pin. Just the general size/ length. The lower holes on the pin (opposite the knurled end) appear to be beveled, like something would be inserted in and out of these holes and a regular basis, much like a cotter pin.
Anyway, I’m just thinking out loud here…:facepalm
