Smooth and lethal gunfighter Lee Calloway helps three bandit brothers escape from jail under the condition that they give him fifty percent of the stolen gold they have hidden. Of course, the treacherous sibling trio don't plan on keeping their end of the deal.
A lone gunman hunts the fearsome Apache Satago across the plains of the Wild West. When Satago's marauders ambush a stagecoach, the gunman rides to the rescue of the trapped passengers and helps them in their last stand against the deadly Indians.
Mann is a gunman informed by a childhood friend that his father was murdered years earlier by his mother and her lover. To make matters worse, Mann's sister, who is in love with his friend, is held under the thumb of his murderous mom. The two gunmen ride off to have a reckoning with her.
Passing through a town, a farm boy aspiring to be a bounty hunter rescues a woman who has been tricked into working in its brothel and the two travel towards his father's ranch.
After his girlfriend dies in childbirth, Confederate deserter John Warner travels to Mexico, where the woman's father, Don Pedro Sandoval, grudgingly hands over his child. But with no locals willing to provide milk, the baby dies. Rounding up a group of rebels, Warner goes on a rampage through northern Mexico, with the ultimate goal of taking down Sandoval in this gritty Western.
Don Juan, the governor of a Mexican province, arrests Manuel, the fiancé of the beautiful heiress, Virginia. When Quintana frees Manuel, Don Juan kidnaps Virginia to force her hand in marriage. The ceremony is interrupted in a violent battle.
Renegade Confederate soldiers take over a frontier town, but after they molest a young black woman, a group of ex-slaves arm themselves and counter-attack.
Photographed by famed cinematographer Laszlo Kovacs just before embarking on EASY RIDER (1969), Mark of the Gun is a classic western tale of outlaws and the women they love.
Braddock is an influential and highly respected citizen of the town of Two Arrows. He also represents a group of Mexican outlaws led by Valiente. Braddock plans an important robbery with only two young men, Loring and Parker, standing in the way of the bandits.