This one looks real to me. I cant read the language... but it def looks Korean.
For the longest time, the South Koreans used US arms and gear. I know for a fact that firearm collectors are itching to get their hands on the thousands of M1 carbines and Garands that the South Koreans want to send back.
I don't often get "feelings" about stuff but something about it seems legit. Liner mathes as well.
This is a Korean MP's helmet these are quite scarce and this one looks like it could be legit
South Korean, Chris! The Northern guys would have worn Russian stuff!!
Here's an article I found quickly on google about the Korean M1s that may be coming back home:
Bill May Allow Korean M1 Garand Rifles to Finally Return to the U.S. | OutdoorHub