Blood for a Silver Dollar

Un dollaro bucato also known as One Silver Dollar or Blood for a Silver Dollar is a 1965 ItaloFrench Spaghetti Western film, directed by Giorgio Ferroni and stars Giuliano Gemma.

Giuliano Gemma plays a Confederate soldier who returns from the war to fight one at home. Prior to his release from the Prisoner of War camp his pistol has its barrel sawn off.He is informed of a new gangster in town named Black Jack who has wreaked havoc in the community. Gemma agrees to kill the man, only to discover too late that the outlaw is actually his brother, which his employers had known all along. With vengeance he turns on his employers, who then shoot him. ........

Source: Wikipedia