I'm sharing a quest from someone on another forum to solve the mystery of this little disc is embedded into the side of the stock of a Winchester 1907 self-loader. See pics below.

The object is not connected in any way to the other workings of the gun.

The little pin flips up when its not covered by the rotating half-moon.

What the heck is it?!








Last edited by ninepointer; 08/03/19 08:47 PM.