While designed to build drones at the point of need, Firestorm's containerized 3D-printing factory is proving invaluable for manufacturing basic repair parts for other military hardware. It can print a replacement for a simple part like a coolant tank that otherwise has a 10-month supply chain lead time.

Emil Michael warns defense tech founders that a prototype is not enough. The Department of War requires a credible plan for mass production. Startups must prove they have mastered the "skilled manufacturing piece" to win large contracts.

The push to build defense systems in America reveals that critical sub-components, like rocket motors or high-powered amplifiers, are no longer manufactured domestically at scale. This forces new defense companies to vertically integrate and build their own factories, essentially rebuilding parts of the industrial base themselves.

The US defense industry's error was creating a separate, "exquisite" industrial base. The solution is designing weapons that can be built using existing, scalable commercial manufacturing techniques, mirroring the successful approach used during World War II.

Additive manufacturing enables a new paradigm for military supply chains. Small plastic and metal 3D printers can be placed in standard shipping containers (CONEX boxes) near the front lines, allowing for on-demand production of drones and munitions, increasing responsiveness.

While startups excel at invention, Undersecretary Michael points out their primary disadvantage against established primes is the ability to manufacture and scale production reliably. He urges new entrants to build this 'muscle' early, borrowing from the 'old world' to cross the chasm from concept to deployed product.

The decisive advantage in future conflicts will not be just technological superiority, but the ability to mass-produce weapons efficiently. After decades of offshoring manufacturing, re-industrializing the US to produce hardware at scale is Anduril's core strategic focus, viewing the factory itself as the ultimate weapon.

To avoid obsolescence and maintain readiness, defense manufacturing must shift to a modular, flexible model akin to a contract manufacturer. Anduril's "Arsenal" campus is designed to pivot production on a dime between different systems, ensuring a responsive supply chain in a crisis.

A16z's Connor Love argues that the key challenge for defense and industrial startups isn't securing government contracts, but their physical ability to scale production. The question is whether these companies can build the 40 "Tesla factories" needed to produce tens or hundreds of thousands of units, not just thousands.