On l'appelle Trinita (1970) La main droite du diable - Terence Hill & Bud Spencer Film Western

Trinity, a lazy but quick‑witted gunman, teams up with his brother Bambino, a formidable brawler, to thwart the plans of the tyrannical Major Harriman, a Mexican bandit, and his henchmen. The brothers uncover Harriman's plot to seize the land of a peaceful colony and threaten to destroy the settlers. They rally the colonists, using their fists, cunning, and Sarah's gunfire to set a trap for Harriman's forces, leading to a showdown where Bambino's brute strength and Trinity's speed turn the tide.