The ability to utilize, repair, and create technological items are all but forgotten in the dome. Most technology available in the dome has broken down in the last 400 years, from cars to robots to consumer electronics and weapons, but survivors are still out there. A working firearm is as rare as a magical sword, and working factories or laboratories can define an entire tribe, as the gene sequencing facility defines the Redstone Lords.

A great deal of the technology in Under the Dome comes from Pathfinder's Technology Guide, though some are taken from other sources, real life, or made up on the spot.

Firearms