I've added a photo of the "Bizarro" square world piece ( Superman comic reference )
Note: the aluminum mount for the scope , ( barrel is drilled for 3 screws ), there is also some kind of ramp front sight and a V block rear sight.
The Barrel was dove tailed for front sight and it is open and visible under the ramp thing !
There is no Rust pitting on either the receiver or barrel in fact there's original bluing under the butchered foreshock.
The best thing "if it could be rescued, would be re- barrel and replace the foreshock, the butt stock aside from the polyurethane coated finish is pretty nice....