The mobile war factory and the Fist of Nod are special units in Firestorm that allow GDI and Nod commanders, respectively, to produce units close to the battlefield or wherever they needed them.

The unit was about as heavy as a mobile construction vehicle so it could only move very slowly around the battlefield and was unarmed, hence it required escorts. However, it was heavily armoured, and able to withstand light attacks. GDI could use Orca Carryalls to transport these units about the battlefield, ensuring a steady supply of replacement units as and where they needed to enable GDI to more effectively project firepower when needed on short notice.

When deployed, it was a fully functional war factory capable of producing all units in GDI and Nod arsenals, respectively.