Gun Fight (1961)

On the stagecoach to Laramie, Wayne Santley rescues singer Nora Brown from the advances of gambler Cole Fender. In Laramie, Wayne discovers his brother Brad is an outlaw, but he refuses to join the gang of rustlers and sets up a homestead. He and Nora are married. Later Brad repents and joins his brother, but Brad's former partner Pawnee organizes an attack on the brothers. Despite the source that seems to think so, this was not an M-G-M production.