In "Out for Justice" Seagal wore the Green Beret with the 5th Group Flash in a portion of the movie.
This is because he had a student who was a Green Beret in 5th Group in Vietnam/Laos,so he heard stories from this guy and adopted part of this guys life as part of his,Seagal's,persona and it found its way onto the screen.
I have seen people wearing the Green Beret on the street,never with Flash and Crest.
Never have seen a Green Beret wearing one daily.
Have seen them wearing them at reunions and funerals.
Seagal never served in any military or in any Government agency.
Part of the reason he went to Japan and married a Japanese woman was to avoid the possibility of being drafted.
I had opportunity to meet and speak with Seagal ,and he is a funny guy and a friendly guy,but he is an Actor with a life that is a story.
He is still making money with his direct to DVD and or TV movies and his just finished Reality show about himself as "Lawman".
In the show the Lawman,his final show had him setting up a scene for a future movie,they said his movie signature is explosives,shoot outs and high body counts.
So "Out for a Kill" fits his goals.