During the showdown in Silverado, Emmett is shot in his right leg, in a spot visible from most angles. After racing the horse to another end of town, and killing him, there is a shot of Emmett on the horse where you can see almost his entire right leg, and no bullet hole is visible, either in his leg or pants.
Crew or equipment visible
Errors in geography
Making his escape from the jail Danny Glover's character throws a knife with his thick arm stuck through the bars and kills the deputy instantaneously with a deeply penetrating knife wound to the chest. The throw angle has been cheated to make it look like he has room to freely throw the knife making the throw trajectory nearly parallel to the jail cell bars when in reality the entrance door the the deputy enters the room through is directly opposite, perpendicular to Glover's position in his cell. Glover couldn't have drawn his arm back far enough to impart much force to the big knife. The knife would have had to been thrown with great force in order to break or slice through the bone of the deputy's rib cage/sternum and penetrate deeply enough into the heart or lungs to inflict a fatal wound. This type of wound isn't instantly fatal as portrayed, exsanguination would take minutes, the deputy would not hit the floor instantaneously upon impact of the knife. He would be animate, still breathing and writhing until eventually losing consciousness from blood loss or drowning from blood accumulating in the lungs.
After saving the wagon trains money from the gang in the canyon, Emmet, Paden and Mal are sitting on horseback talking as the wagon train moves from right to left behind them. One wagon can be seen with the wagon tongue clearly broken and being dragged behind the lead team. The only way the team is attached to the wagon is by the reins in the drivers hands.
The movie is set in the early 1880s. When the settlers open their cash box to show Baxter and Hawley the money they've been promised to escort the settlers to Silverado, we see the 1886 Martha Washington $1 silver certificate, the 1917 George Washington $1 legal tender note, the 1907 (or 1922) Michael Hillegas $10 gold certificate, and the 1907 Andrew Jackson $5 legal tender note. The 1917 Washington $1 is distinguishable from other issues by two indicators: the small red seal on the left, and the serial number below the seal, which is not in a dark gray box. The 1907 Jackson $5 is distinguishable from other issues by two indicators: the small red seal on the right, and the small red Roman Numeral V on the left. The 1907 (or 1922) Michael Hillegas $10 gold certificate is distinguishable from the 1922 Ulysses Grant $50 gold certificate by the shape of the white shirt in the portrait at center, and by the lower-right corner border around the encircled number.
'Float' glass is used in window glazing throughout the film, a flatter more uniform glass made in large sheets by a modern industrial rolling process not available at the time. Glass used in 1880 Silverado should be wavy 'cylinder' glass of the period. Cylinder glass was made by hand blowing glass into cylinders which are then cut down the side in a straight line when cooled, reheated and flattened out into small panes with noticeably irregular surfaces.