Raiders of the Sun.

Bloodthirsty factions rule the barren earth. It's the 21st Century and a biological disaster has ruined the planet. Here, in a world where gunpowder is more valuable than gold, a few hundred survivors wage the final conflict for power and control. Yet among them rises a new warrior, destined to shape the aeons which will follow -- a man who stops at nothing to achieve his ends, and for whom courage is the only commodity