I think this movie made pre 1971 as I was in then and we had subdued name and US ARMY patches etc on fatigues, all subdued patches. Also by 71 about 90% of our Drill sgts in the army were "non white", i.e. mostly African American, Asian, etc. Think there was one Drill Sgt white. Our 3 story barracks looked something like that in basic. but all concrete and block mostly.
Also the movie shows M14? and we had M16 by '71