Modular Microfactory Cells (MMCs) are self-contained manufacturing units approximately the size of a standard shipping container, capable of producing a defined catalog of parts and finished goods through a combination of multi-axis CNC milling, directed-energy sintering, and robotic assembly arms. Each cell ships pre-calibrated with a licensed production library—a curated set of geometries, material specifications, and assembly sequences authorized by the cell's corporate vendor. Operators slot in raw material cassettes, upload a production order through the vendor's cloud interface, and the cell executes the job autonomously, logging every step to a tamper-evident distributed ledger accessible to both the operator and the licensing authority.

MMCs emerged in the late 2060s as corporations sought to collapse long supply chains made brittle by repeated climate disruptions and geopolitical fragmentation. Rather than shipping finished goods across half a continent, firms licensed their manufacturing IP to local cell operators who produced on demand and sold within a defined geographic radius. The model proved enormously profitable for the IP holders, who collect per-unit royalty fees regardless of which cell produces the item, while transferring capital costs and operational risk to the franchisee. In GLMZ's mid-tier industrial districts, MMC clusters occupy former retail plazas and warehouse shells, their exhaust stacks and material delivery bays reshaping neighborhoods that once moved consumer goods into neighborhoods that now make them.

Access to MMC production is sharply tiered. Tier-1 corporate campuses operate proprietary cells running unlocked production libraries with no royalty overhead—these units produce components for internal supply chains at margins unavailable to anyone below the corporate employee tier. Mid-tier licensed operators in the Merchant and Contractor strata can run approved catalogs and sell to the open market, but are prohibited by licensing agreements from reverse-engineering designs or running third-party geometry files. At the street level, unlicensed cells—colloquially called 'ghost boxes'—run cracked firmware that strips the royalty logging system and accepts any geometry file regardless of IP status. Ghost box operators occupy the informal economy's manufacturing backbone, producing everything from counterfeit medical components to unlicensed weapon parts, and face periodic enforcement sweeps by corporate IP security contractors.

The social geography of MMC distribution maps almost exactly onto GLMZ's class structure. Licensed cells are concentrated in districts with reliable power infrastructure and corporate security presence; ghost boxes cluster in the Fringe and the Underlayer where enforcement is sporadic. Community cooperatives have attempted to pool resources to license legitimate cells collectively, with mixed success—the licensing agreements are drafted to favor individual corporate entities and include clauses that void the license if ownership structure changes, a provision that effectively blocks cooperative ownership models. Several mutual-aid networks have circumvented this by maintaining a nominally individual licensee as a legal front while distributing operational control internally, an arrangement that sits in a precarious legal gray zone.