Castelion

Forging the future of hypersonic strike weapons through Modern Defense Production

[Castelion @Castelion]

🏴‍☠️🏴‍☠️🏴‍☠️

[NAVAIR @NAVAIRNews]

Coming soon to a theater near you...BLACKBEARD!

@USPACOM @CENTCOM @PAEAviation

[Castelion @Castelion]

Thank you, Rep. Mike Levin, for visiting Castelion HQ to see how we design, test, and build hardware in support of the nation's conventional deterrent.

[Castelion @Castelion]

Not a bad summer.

[Castelion @Castelion]

Deterrence depends on systems that can be produced in sufficient numbers, quickly, and affordably. We've designed Blackbeard with production in mind from the start.

Thanks to @specialreport for the coverage.

[Special Report @SpecialReport]

MULTIMILLION-DOLLAR PRICE TAGS: As the U.S. looks to refill its missile stockpiles and counter sophisticated adversaries, the military is investing heavily in maneuverable hypersonic weapons. From multi-million dollar legacy projects like the Army's Dark Eagle to innovative startups building sub-$500,000 systems and expanding testing capabilities, we break down what it takes to secure America's technological edge.

[Castelion @Castelion]

Our co-founder and CEO @hargsb is speaking on the Future of Fires Panel at AUSA 2026. Hope to see you there.

[Castelion @Castelion]

Blackbeard for HIMARS. See you at AUSA 2026.

[Castelion @Castelion]

America has spent decades developing hypersonic technology. The challenge now is manufacturing it at scale.

Our CEO @hargsb joined @jimsciutto on @cnni to discuss rebuilding domestic supply chains and delivering affordable hypersonic weapons at the scale our military needs.

[Castelion @Castelion]

Container-compatible Blackbeard. Built to move with the fight.

[Suffiyan Malik @suffiyanmalikk]

My first conversation with Bryon Hargis (@hargsb), Cofounder and CEO of @Castelion. This is a special edition of our show recorded at @reindsummit. Since then, Castelion has announced a $1 billion Series C funding valuing the company at $13 billion making it one of the most valuable defense technology companies in the ecosystem.

What we cover:

- Why Bryon sold his SpaceX stock to bootstrap Castelion and bet two-thirds of his savings on the mission.
- Why affordable, mass-produced hypersonic missiles are central to his vision of American deterrence.
- Building Blackbeard, winning the first Navy order, and scaling production to thousands of missiles a year.
- The SpaceX lessons behind faster hardware development: rapid testing, questioning convention, and knowing when to change course.
- Hiring for mission over money and why company culture is built one person at a time.

TIMESTAMPS

00:00 Intro
01:00 Bootstrapping with SpaceX stock and crypto mining
07:00 Why Bryon started a defense company
11:00 Building deterrence and landing the first Navy order
14:00 Scaling missile manufacturing in New Mexico
18:00 Meet Blackbeard: Castelion’s hypersonic missile
20:00 Hypersonic vs. ballistic vs. cruise missiles
23:00 Golden Dome and the future of missile defense
25:00 How SpaceX enables America’s national security
27:00 Elon Musk, ambitious deadlines, and moving faster
30:00 Why rapid testing beats over-engineering
33:00 Lessons from SpaceX: Question convention, follow the data
38:00 Hiring for the mission and building company culture
45:00 Growing as a founder and being willing to be wrong

Congrats to friends of the show @a16z @davidu @TheAmbitionCap @lacostejonathan and others including @lightspeedvp @AltimeterCap @generalcatalyst

Special thanks to @falondonohue @austinbishop @aphysicist for hosting @WeThe_Builders in Detroit

[Castelion @Castelion]

We're building something big in New Mexico, with the people who call it home. Join us! https://t.co/rKC54uGw0C

[Castelion @Castelion]

Our CEO @hargsb joined @SpecialReport to discuss how Castelion is manufacturing munitions differently. Thank you, @BretBaier, for the focus on rebuilding America’s arsenal.

[Special Report @SpecialReport]

BOLSTERING THE DEFENSE INDUSTRIAL BASE: @BretBaier examines efforts to overhaul the defense industrial base through stable, multi-year funding frameworks and a growing reliance on agile commercial startups. As Under Secretary of War for Acquisition and Sustainment Michael Duffey notes, multi-billion-dollar deals with prime contractors like Raytheon, Lockheed Martin, and Northrop Grumman are locking in production for critical systems like Tomahawk, THAAD, and Patriot interceptors. Meanwhile, the Defense Innovation Unit and next-gen tech firms like Castelion and Rocket Lab are utilizing rapid commercial manufacturing practices to scale up hypersonic capabilities and outpace modern threats.

[Bryon Hargis @hargsb]

Building Blackbeard is possible because of the @DeptofWar's commitment to building low-cost munitions at scale. Thanks @BretBaier and @SpecialReport for having me on.

[TWZ @thewarzonewire]

Blackbeard Hypersonic Missile Seen Flying On F/A-18 Super Hornet For The First Time

The Navy is pushing to get Blackbeard, a lower-cost and fast-to-produce standoff weapon, into operational service by 2028 at the latest.
https://t.co/T6ac18SUPt

[PAE(A) @PAEAviation]

Coming soon to a theater near you...BLACKBEARD!

@CENTCOM @USPACOM

[Bryon Hargis @hargsb]

@NAVAIRNews @USPACOM @CENTCOM @PAEAviation Incredible shots! 📸 📸 @Castelion is honored to be onboard.

[Castelion @Castelion]

Gertrude, Reloaded.