|The following is based on information from Van Buren design documents and is not canon.|
In talking to/about Chagas, you hear that he was being chased by a "metal bug" in the wastelands when the tribals found him (he calls it a robot because he spent some time incarcerated and knows what it is, but the other primitives don't). The Blackfoots that saw the pursuit were able to take it out with some lucky shots from their precious zip guns and pipe rifles. It's still sitting out there in the wasteland, and one of the raiders who saw it can lead you there for a price.
Character type completion breakdown
- CombatBoy - Can steal ammo from it.
- ScienceBoy - Can loot it for parts, or stumble across it accidentally with a high enough Outdoorsman skill.
- DiploBoy - Can negotiate a better price for the guiding.