Mount Saming(1973)

Original title: เขาสมิง

The discovery of rubies on a rural mountain sends factions from all across the country to clammer for it, doing everything they can to hold a monopoly on the mountain. A gun mechanic takes up the challenge alongside his cousin, but they are both soon ambushed by a gang led by a brutal godfather. When his cousin is killed, he reaches a boiling point and a new goal in his mind arises: kill everyone.