There is a couple different bolts they used on the model
80 and 81.
I am not sure what else is different, but I know the width
of that cocking piece is different, because I have run into
Looks like someone couldn't find the right one and modified
that bolt to fit.
It looks like to me someone has filed on the
notch on that bolt body too.
That cocking piece looks like it's not acting
right...It should ride tight against the
notches at the rear of the bolt body.
It's possible you could make that one work
You got nothing to loose, drive the pin out
ant take it apart...see if your spring is
The frustrating thing is that a bolt itself is as high as
the rifle usually.