Nothing harsh. The overall premise of the film is that two missionaries have been kidnapped and held for ransom.
A missionary dreams about being executed.
Two missionaries are beaten, mostly off screen. They are shown with bruises on their face and handcuffed for a good duration of the movie.
Two missionaries have guns held to their heads. (Like in the poster.)
A man rubs his gun over another mans head and face mockingly and holds it to his head. Then he puts the gun to his own head with the captors finger on the trigger. The scene is dramatic as the man is drunk so the outcome is anyone's guess during the scene.
Opinion alert: Without the above scene my guess is the movie would be PG.