Akaitama sent us these photos he took of a M60 Light Machine Gun he used during Reserve infantry battle formation training. His staff sergeant said the gun had been used in the War in Laos (1953-75). This would make it about three times as old as the men who train with it.
Akaitama did not say which Army Reserves he served with and I do not recognize the uniform. M60 and M1 Garands were, and still are, widely used in Southeast Asia for arming reserve and training units.