Can you link experts out there tell me the proper designation for some links that I have. They are what I call closed loops. When assembled, the links fit on the cartridge upper body and neck. The design required the cartridge to be extracted from the rear and dropped into position for moving into the chamber for firing.
I can take a photo if necessary but I’m hoping my description is good enough.
What is the correct designation, what MG are they designed for, and what time period were they used.