There aren't that many movies based on the Vietnam war that are 'soldier's stories', that is made from the point of view of an average soldier and hopefully as realistic as possible. And the ones that are out there tend to be fairly inaccurate or imbellished.
There's a movie called
84C MoPic, a Vietnam war movie made from a kind of Blair Witch Project - point of view of a camera crew. I saw it some time ago and it's pretty interesting for a small budget movie.