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.
A gang of outlaws gather at a desert saloon after robbing a bank. However, the loot is missing and paranoia sets in, as the outlaws start knocking each other off
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.
Ruthlessly pursued by the Rogers family following a dispute over cattle, Ben Caine is chased back to the Caine Ranch. Despite his wife Maria's desperate pleading, the Rogers family hangs Ben Caine, forcing Maria to watch. Consumed with revenge but finding her two brothers-in-law reluctant to assist, Maria enlists the help of Manuel. He agrees to Maria's plan with reluctance, in part because of his deep feelings/attraction to her. Manuel finds employment as foreman at the Rogers' ranch and surreptitiously kidnaps Pa Rogers' only daughter Johanna . With Johanna as the bait, Maria will be in the perfect position to exact her revenge on the Rogers but things don't turn out quite as planned.
Three men meet in the same prison and in their cell they find a Mexican boy condemned to death for murder. One night the three convicts are mysteriously released by a priest and the father of the Mexican boy who promises them a reward of $30,000 if they can find the real murderer within ten days. Certain that the Mexican boy is not guilty, Reno and the others organize a plan which leads to the unmasking of the real killers.
Chad Stark is offered his life and a nice ammount of dollars if he is to bring back the runaway son of mexican land-owner Gutierrez . This son, Fidel, teams up with an outlaw band lead by a former military man going by the name The Major. When Stark finds Fidel he is reintroduced to an old acquaintance which makes his job of returning the son a lot more difficult.
Luke Barrett, having lost his memory due to an accident, does not realize that Dingus had killed his wife and brother to take possession of the Barretts' land and money. At first Luke trusts him, but while looking for his forgotten identity he discovers the truth.
When sheriff Joe Williams is unjustly accused of the murder of a young couple, which was in reality committed by the Mexican "La Muerte", Joe becomes a wanted man. Joe manages to steal and hide the loot from a bank robbery committed by the Mexican gang, but then is captured by them, but the new sheriff, Joe's friend, is on their trail.
Bill learns that his father, during the American Civil War, was accused of theft and killed. Convinced of his innocence, Bill discovers the true robbers.
Returning home, Ross Logan immediately gets into conflict with the Carranza gang, which had just crossed the Mexican border and has occupied a nearby Hacienda. After his brother is killed he plans a cold blooded revenge for which he separates the gang's most dangerous members by using their individual weak points and the general discordance amongst them. The time for the final confrontation is set by the astronomically interested Logan amidst an eclipse.
Johnny King, a rebellious drifter, sets out to avenge the death of his mentor and friend, Steve, after he has been murdered for his land by the Ward Brothers. After causing some trouble for the Wards, Johnny faces a new opponent, his outlaw friend, Meredith.
When the lead robber in their gang steals the money from his two companions, a cat and mouse/back and forth game plays out as the men try to get the money for themselves. But another player, the heir of the sneaky gang leader, is also on the hunt...