Yep, looks like a shim to me.
Type: Posts; User: W5USMC; Excluded Forums: Milsurp Knowledge Libraries (READ ONLY)
Yep, looks like a shim to me.
The "C" on the receiver bevel is most likely a partial ord bomb stamp that is found on Underwoods. Sure don't recommend removing the front sight just for the heck of it.
Edit,
Sorry Singer B beat...