man with the golden winchester (1973)

aka The Son Of Zorro. Il figlio di Zorro.
"...to the revolution and the freedom of Mexico."
Zorro (Alberto Dell'Acqua) aids an American gun-runner (William Berger) who is supplying arms to the Mexican revolutionaries who are trying to overthrow Emperor Maximilian.
Run of the mill re-tread of the Zorro story, with a hero prettier than the heroine!

black jack (1968)

aka On Your Knees Django. Black Joe. Un Uomo per cinque vendette.
"Jack Murphy is dead and buried here."
Bank robber Black Jack (Robert Woods) is betrayed by his gang, who rape and murder his young sister, and leave him crippled for life, and wanting revenge.
What starts as your standard western, soon mutates, into a bleak and violent revenge story, where the hero is half mad with his pursuit of vengeance.