Hello, comrades! I have tried to find some information about using the M14A1/M14E2 in wars or conflicts, but I've found nothing except it's duty in Vietnam. But i don't believe that it was in use only in Vietnam. Can you help me please with giving more information about M14A1/M14E2 duty?

I know it's the hardest part to find. Looking for the metal and rubber pads, flapper, and screws. Chip