Wilhem Scream - A few minutes into the beginning of the film, Nicolas Cage's character shoots a man, and the Wilhelm Scream can be lightly heard.
The first traditional western starring Nicolas Cage.
The music and melody on the soundtrack after the initial scene as the "20 years later" scene begins was stolen from the score of Randy Newman's music for The Natural (1984). I don't know if it was used by permission or not.