M.T.Pockets,
The 7.62x51mm (.308) round was adopted in 1957 with the M14 rifle; that was 4 years after the Korean War ended.
A bayonet was standard issue with the Garand. I recommend you read Bruce Canfield's book, "U.S. Infantry Weapons of WWII" ISBN:0-917218-67-1. Many WWII weapons were used in Korea.
Adam
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Adam Helmer
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