I am try to disassemble this bolt to remove firing pin so I can clean and oil. My father just gave me this rifle and I’m sure it has never been done in the last 20 years. It’s a 2 lug bolt and manufactured between 1974 and 1979. Does anyone have a procedure or discretion on how to do this. I have been able to rotate the firing pin and shroud 360* but nothing seams to be release the shroud. The pin on the left hand side shows that it has moved inward and sometime or the other but when rotating it does not want to move. It may be locked up if’s supposed to move. Any help would be appreciated.