Forging the future of hypersonic strike weapons through Modern Defense Production
Joined October 2023
- Tweets 211
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- Followers 4,907
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113 Photos and videos
Pinned Tweet
May 13
News from @DeptofWar about commitment to new entrants and Low-Cost Hypersonic Missiles:
Once @Castelion achieves testing and validation, the DoW will award a multi-year contract for a minimum of 500 Blackbeard missiles annually, while seeking the necessary authorizations and appropriations for over 12,000 total missiles over five years via @DoWCTO Read more: x.com/DoWCTO/status/20545725…
May 13
The @DeptofWar has reached new framework agreements with a slate of disruptive new entrants to aggressively expand the United States military’s lethal cruise missile and hypersonic missile strike capabilities.
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Low-Cost Containerized Missiles (LCCM) Program:
• Anduril
• CoAspire
• Leidos
• Zone 5
Low-Cost Hypersonic Missiles:
• Castelion
This effort positions the Department to procure 10,000 LCCMs over three years, starting in 2027. Once Castelion achieves testing and validation, the Department will award a multi-year contract for a minimum of 500 Blackbeard missiles annually, while seeking the necessary authorizations and appropriations for over 12,000 total missiles over five years.
These agreements will rapidly field effective and affordable kinetic mass for the Joint Force at scale, acting directly on the mandate from President Trump and Secretary Hegseth to strengthen America’s Arsenal of Freedom.
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Castelion retweeted
Jun 11
The ability to project force, at scale, across a number of domains is the bedrock of American security. Today, I’m excited to publicly announce our partnership with @Saronic to enable an affordable approach to do exactly that at sea. Demonstration coming in 2027.
Jun 11
We're partnering with @Saronic to launch Blackbeard from their Marauder (MUSV), a first-of-its-kind capability.
"Blackbeard and Marauder will give our warfighters more shots, from more places, with fewer constraints," said our co-founder and CEO @hargsb.
At-sea demonstration targeted for 2027. Read more here: castelion.com/news/saronic-a…
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Castelion retweeted
A hypersonic missile on a beer budget: @katebachwsj interviews Bryon Hargis and Andrew ÂKreitz
on.wsj.com/4uAmj0z
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Castelion retweeted
Jun 12
.@Castelion is integrating its Blackbeard low-cost hypersonic weapon on @Saronic's Marauder autonomous surface vessel—the first such ASV-hypersonics pairing, according to the companies—with plans to demo the combo package in an at-sea launch next year.
tectonicdefense.com/castelio…
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Castelion retweeted
Jun 12
Why is it so important for America to create its own hypersonic missile program? Why has this been an urgent mission for the last few years, and why does it feel so sorely needed?
According to @hargsb, the hypersonic missile solves 3 problems:
1. Range: hypersonics fly high in the atmosphere, where drag is minimal, covering vast distances for their size.
2. Speed: faster than Mach 5, closing a target before it has time to move.
3. Survivability: exceptionally hard to shoot down, which means it reaches its target.
The US has understood all 3 for decades. What it has never solved is cost. "You have to build enough of them that they care," Hargis said.Â
@Castelion is building for all 3, at a price America can actually afford to scale.
Jun 2
"I want to leave a safe world for my kids. This is what I got."
Bryon Hargis (@hargsb) is the founder and CEO of @Castelion, a defense startup building hypersonic missiles the way SpaceX builds rockets: fast, iteratively, and cheap enough to produce in quantity.Â
His conviction is that America does not have a weapons problem. It has a manufacturing and learning rate problem. And that gap is more dangerous than any single technology demonstration.
Timestamps
(0:00) Intro
(4:01) Why America needs hypersonic missiles
(12:05) The missing middle ground in deterrence
(19:40) How hypersonics differ from ballistic missiles
(25:05) The economics of defensive vs. offensive systems
(28:21) How SpaceX differs from traditional aerospace
(37:40) Why Bryon chose to build in defense over space
(42:42) Key factors that drove Castelion’s success
(1:01:06) The importance of lower costs and quicker manufacturing
(1:10:04) Book recommendations
Thank you to the partners who make this possible
@dottechdomains: An identity for builders at their core: go.tech/thegeneralistnl
@ahrefs Brand Radar: Find your brand in AI results: ahrefs.com/generalist
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Castelion retweeted
Jun 11
Today, @Saronic and @Castelion announced plans to join forces to launch a hypersonic vehicle from an unmanned surface vessel. By integrating Castelion’s Blackbeard with Saronic’s Medium Unmanned Surface Vessel (MUSV) Marauder, the two companies offer a powerful, credible option to deter would-be adversaries
navalnews.com/naval-news/202…
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Jun 11
Excited to get Blackbeard on the water with Marauder. Let's go!
We're excited to join forces with @Castelion to integrate the Blackbeard hypersonic missile with our Marauder MUSV, demonstrating a first-of-its-kind maritime hypersonic launch capability.
By pairing autonomous maritime platforms with hypersonics, we are advancing a more distributed and survivable approach to deterrence. Together, we're working to increase capability and capacity by combining autonomous maritime and hypersonic strike capabilities that are more affordable, scalable, and faster to field.
With a demonstration targeted for 2027, both companies are investing in the production infrastructure needed to deliver these systems to the warfighter at greater scale and speed.
Read more here: medium.com/saronic-technolog…
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Jun 11
We're partnering with @Saronic to launch Blackbeard from their Marauder (MUSV), a first-of-its-kind capability.
"Blackbeard and Marauder will give our warfighters more shots, from more places, with fewer constraints," said our co-founder and CEO @hargsb.
At-sea demonstration targeted for 2027. Read more here: castelion.com/news/saronic-a…
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Jun 5
Our Co-Founder and CEO @hargsb has said this since day one.
Hypersonics isn't a new idea. The U.S. has understood the concept for decades. The problem never was the physics. The hard part is producing enough of them to actually matter at a cost the country can afford.
That's what we're here to fix. Listen to @hargsb's full interview on @thegeneralistco podcast with @mariogabriele. đź”—below:
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Jun 3
Building hypersonic missiles at scale is hard. Building them affordably enough to matter is harder.
Our Co-Founder and CEO @hargsb joined @mariogabriele at @thegeneralistco to talk through why America's deterrence gap is a manufacturing problem, what it took to go from concept to 26 test flights in 2.5 years, and what comes next.
youtu.be/OfuWpsFH1bs?si=QdB7…
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Castelion retweeted
Jun 2
"I want to leave a safe world for my kids. This is what I got."
Bryon Hargis (@hargsb) is the founder and CEO of @Castelion, a defense startup building hypersonic missiles the way SpaceX builds rockets: fast, iteratively, and cheap enough to produce in quantity.Â
His conviction is that America does not have a weapons problem. It has a manufacturing and learning rate problem. And that gap is more dangerous than any single technology demonstration.
Timestamps
(0:00) Intro
(4:01) Why America needs hypersonic missiles
(12:05) The missing middle ground in deterrence
(19:40) How hypersonics differ from ballistic missiles
(25:05) The economics of defensive vs. offensive systems
(28:21) How SpaceX differs from traditional aerospace
(37:40) Why Bryon chose to build in defense over space
(42:42) Key factors that drove Castelion’s success
(1:01:06) The importance of lower costs and quicker manufacturing
(1:10:04) Book recommendations
Thank you to the partners who make this possible
@dottechdomains: An identity for builders at their core: go.tech/thegeneralistnl
@ahrefs Brand Radar: Find your brand in AI results: ahrefs.com/generalist
@withpersona: Trusted identity verification for any use case: withpersona.com/generalist
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May 29
Our 1,000-acre hypersonic manufacturing facility in New Mexico will produce munitions at the volume America needs. 🇺🇸
We're on track to start production stress tests by year end, giving us pre-planned time to work out production kinks before delivering to the warfighter.
This is what moving fast looks like. Join us castelion.com/careers/
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Castelion retweeted
May 28
Eight Altimeter portfolio companies on the 2026 @SVDG_official NatSec100, the annual ranking of the top venture-backed companies shaping U.S. national security by Silicon Valley Defense Group, in partnership with @jpmorgan.
Congrats to @anduriltech, @boomsupersonic, @Castelion, @databricks, @HadrianInc, @K2SpaceCo, @OpenAI, and @VulcanElements. 🎉
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May 26
Honored to be recognized among the Top 10 on the 2026 #NATSEC100.
Thank you @SVDG_official & @JPMorgan’s 2026 NatSec100 for this recognition, and for the work you do to track where this ecosystem is delivering. Proud to be counted among the companies turning defense innovation into a production reality.
ALT Castelion ranked #9 in #NatSec100 in 2026.
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May 22
RT @hargsb: Dropping a video update from Rio Rancho, NM. Project Ranger is moving faster than most expected, and we want people to see it.…
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