In the scene where the Character played by Robert Redford is asking the young girl to drive the pickup truck, you can clearly see a rifle on the gunrack in the rear. It is visible through the open driver's door from the external shot as the two characters are standing outside the vehicle. As they get into the truck the shot changes instantaneously to a front/windshield view: The rifle suddenly disappeared. Slip-ups like that really shouldn't happen anymore nowadays...