Identifying the defense industrial base as "rotted out," Mock Industries is taking a bottom-up approach. Instead of just building platforms, it vertically integrates to produce high-performance subsystems (radars, engines) and sells them to other primes, aiming to fix the entire ecosystem.

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.

Major defense contractors like Lockheed Martin assemble products in the US, but they rely heavily on a global supply chain for raw materials and components. This dependence, particularly on nations like China for rare earth metals, means the US does not truly control its military production capabilities.

The current defense model, where the designer is the sole manufacturer, creates production bottlenecks. Adopting a modular approach—where one company designs and multiple companies can manufacture, as with the WWII Jeep—is crucial for rapidly scaling production and building a resilient supply chain.

The current conception of the defense industrial base focuses on large primes like L3 and General Atomics. However, 98% of US manufacturing is done by small businesses that are not integrated into the defense supply chain. A key investment would be creating a pathway to bring these smaller, agile companies into the fold.

Post-WWII, 94% of major weapons spending went to dual-purpose companies like Chrysler (missiles) and Ford (satellites). The modern defense industrial base, comprised of pure-play specialists, is a recent development that has reduced manufacturing scale, flexibility, and innovation.

While VCs chase application-layer defense tech like drones, a larger, more critical opportunity lies in rebuilding the underlying domestic supply chain. The US reliance on China for rare earths, pharmaceuticals, and other components is a key vulnerability. Startups that solve this foundational problem represent the next investment frontier.

Beyond giants like Boeing, the defense supply chain's lower tiers consist of small, often sole-source firms. Their financial instability presents a critical, often overlooked, national security risk, as their failure can halt production of essential components.