Thank you,steven,however,I had already found that page,and cannot identify which of those parts and screws are the ones that are missing,unless I can see where they go on the receiver.I am missing the two screws on the non ejection port side,as well as whatever parts they attach to.Also,the sear is broken and some other parts are badly worn,and need replacement,and it is hard to tell which is which from the exploded view,which does not show where to parts fit together.