A bandit kidnaps a Marshal who has seen a map showing a gold vein on Indian lands, but other groups are looking for it too, while the Apache try to keep the secret location undisturbed.
Fifteen-year-old Cav Rand purchases a racehorse and trains him into a winner, but a con artist is plotting to get the stallion away from the innocent Cav.
Geoffredo Scarciofolo (using the pseudonym "Jeff Cameron") is the famed gunfighter Sartana, who is offered a chance at amnesty from the $12,000 bounty on his head if he wipes out Benny Randal, his brother Baby Face, and an equally nasty sheriff.
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.
When the multiple murderer Cain is released from prison after 18 years, he wants to settle down as a rancher and never touch a gun again. But his former life haunts him; not only that nobody wants to give him a job, some villains also want to pay him back. So he has to accept the offer of showman Ruffalo to perform as "Killer Cain" in his traveling shooting show. However after 18 years without practice even Ruffalo's young assistant Billy shoots better than Cain.