Castelion

About Castelion

Castelion is a Torrance, California defense technology company that designs, tests and manufactures next-generation military systems rapidly and at massive scale, with the stated mission of deterring future wars through credible, non-nuclear deterrence. It was founded to restore the United States' ability to field advanced weapons at speed, drawing on the engineering urgency of the Second World War and Apollo eras, and it argues that the current cost and cycle time of developing defense hardware is unsustainable compared with the pace of development abroad.

Its flagship product is Blackbeard, a low-cost, mass-producible hypersonic strike weapon that is compatible with HIMARS and MLRS launchers and has moved from prototype orders to production delivery orders with the U.S. Navy. Castelion vertically integrates core technologies, including its own solid rocket motors, propellant production and an in-house flight computer built for real-time, hardware-isolated and cryptographically secured operation, so that every system is designed for manufacturability from day one. The company runs an intensive flight-test programme, with multiple tests a year in the Mojave Desert and at the Point Mugu Sea Range, and test and production sites in Texas as well as its California headquarters.

Project Ranger is its large manufacturing campus in Rio Rancho, New Mexico, a 1,000-acre site intended to become the largest hypersonic manufacturing facility in the United States, with hundreds of engineering, manufacturing and skilled-trade jobs. It is designed to support high-cadence production of strike systems and to put the company's design-for-production approach into practice at volume.

Castelion's customers are U.S. government and military buyers, including the U.S. Navy and Air Force research and innovation programmes, and its business model is to build weapons in-house and sell them under government contracts, development awards and production orders. It positions itself against traditional defense primes on speed, cost per round and manufacturing scale, working on a hardware-rich, rapid test-and-iterate cycle instead of long development timelines.