Man and a Colt
Un hombre y un colt (original)
Dakota Joe is a hired gunman. For that reason he arrives at a border ranch in Mexico hired by the landowner Don Carlos, to eliminate the village doctor, a good man who helps the poor. So Dakota Joe decides not to fulfill his commitment and together with a former outlaw who is now honored, they plan to steal all the money that Don Carlos stores in the safe and to support the revolution of Zapata
Watch "Man and a Colt" on FlixOlè released in 1967. It's a western movie, and has a rating of 5.5 out of 10 from Imdb which is fairly okay for this kind of movie.