[Raellus]

I agree that to properly rig up a true gun truck, one is going to need access to lots of military hardware (i.e. surplus machineguns). This would be only possible in areas where large military units are operating.

The only exception would be one of those places in the U.S.A. where folks hold those big, multi-day shoot-offs with lots of full auto MGs and stuff and there wouldn't likely be such get togethers during WWIII.

SimonMark's improvised gun truck weaponry would also be an exception.

As we've discussed in other threads, getting a military static display vehicle running would require a lot of resources that most civilians just don't have access to, especially after the country has been nuked a couple dozen times. Dragoon500ly's example is a really good one.