Continuity: There is a scene where one of them jumps on a horse, and you can see one of the crew holding on to the reigns as the horse throws its head back.

Other: In the final scene as Doc tell Billy good-bye if you look up to the top right hand corner of the screen you can clearly see a jet trail in the blue sky. Certainly not possible in those days.

Other: In the final gun battle when the Regulators are trapped in the attic of the burning house, one of the characters backs into the brick chimney that's coming up through the floor. You can see the entire chimney move when he backs into it.

Visible crew/equipment: In the shot where Dirty Steve is on his horse, he asks, "Hey Dog, did you see the size of that chicken?", and then he fires his shotgun. You can see someone's hand come up to grab the reigns of the horse.

Factual error: The Sween home in Lincoln (the home the regulators were trapped in at the end of the movie) was a single story adobe hot a two story frame house and the battle ended at night not broad daylight.

Continuity: Near the end when they're entering the Mexican village, Billy's coat disappears as he rides through the gate.

Factual error: The men in the bar are singing "When Irish Eyes Are Smiling" -- which was not written until about 30 years after the events of the film. Submitted by wizard_of_gore

Visible crew/equipment: In the scene where Buckshot Roberts is going into the outhouse there is a sequence of shots that show Billy the Kid, Dick Brewer and Dirty Steve hiding behind a pile of logs. In almost every shot where these three are seen behind the logs you can see a camera tri-pod leaning against a fence. The sequence lasts over a minute so you have several chances to plainly see it. (Time)

Factual error: When Tunstall is shot they make it look like it happened on New Years Day but it actually happened on Feb. 18.