When firing the Mongoose, with Hawke giving chase on the motorcycle, the chap in the back of the truck is wearing a red and white jacket (when viewed from above) but when he's shown face on, he has a solid great jacket on.
When Karl is finished demonstrating the laser for the arms dealer, he unplugs a cable from the gun and its power supply. This cable is really a cord for an electric guitar.
Jan-Michael Vincent previously played a stuntman in Hooper (1978), which even had a wild west show exhibition.
The wild west town was the same town used as the company town in Eruption (1985). The general store and the company store in in Eruption (1985) were the same building.