What is this?

[Vlad 11]

Received a box of some old reloading odds and ends. Don't know what this Lyman gizmo is for and I'm sure someone here does.


So what is it?

[pacrat]

Reciever sight......aka peep sight. Missing the mount portion.

[Vlad 11]

thx

Doh, thought it looked like a sight but being in a box of reloading stuff and the Lyman name threw me off.

No mount or peep aperture, oh well.