Interesting Vietnam movie: Lots of M1/M2 Carbines
One of my favorite war flixs "Go Tell The Spartans" chronicles Vietnam in 1964 through the advisors at a small base. Burt Lancaster is the Major commanding the "Military Assistance Advisory Group" in the movie. I found it on Youtube in its entirety. Correct weaponry for the time: M1/M2 Carbines, Garands, BARs, M3 geaseguns nd Thompsons, with old bolt action and pump shotguns thrown in for good measure.
Go Tell The Spartans 1978 Full Movie - YouTube