I have also inherited a model 310 and while it is excelent shape I was told that at one point the bolt came apart while at a range and would not shoot after that.
I am not sure why it was taken out and how it came apart but upon getting it home I took it out myself and discovered that the firing pin was no longer there! Everything works except that when you pull the trigger you get no bang!
Does anyone know where I could find a replacement?