The Space Gun Gambit: Can Kinetic Launch Remake Aerospace?

ALAMEDA, CA – June 23, 2026 – In the world of aerospace, dominated by the fire and fury of rockets, a quieter but potent idea is gaining momentum. Longshot, a defense and space technology firm, just secured a fresh $5 million investment from the venture fund South Park Commons, bringing its total capital to $20 million. The money isn’t for a new rocket engine or a sleeker fairing. It’s for building a gun—a very, very big gun designed to shoot payloads into the hypersonic realm and, eventually, into orbit.

This concept, often dubbed a "space gun," feels ripped from the pages of Jules Verne, yet it represents a serious, calculated effort to dismantle the single greatest barrier to space: the prohibitive cost of launch. By keeping the complex machinery on the ground, Longshot proposes a radical shift in the economics of accessing the upper atmosphere and beyond. "For decades, access to space has been constrained by the economics of rockets," said Mike Grace, Longshot's Founder and CEO, in a statement. "We're pursuing a fundamentally different approach." With this new funding, that approach is about to face its most significant tests yet.

A Return to First Principles

At its core, Longshot’s technology is a sophisticated reimagining of a surprisingly old concept. The system is a multi-injection gas accelerator, a type of pneumatic cannon spiritually descended from wartime projects like the German V-3. Instead of a single explosive charge, it uses a series of precisely timed injections of compressed gas along a very long barrel to steadily accelerate a payload. This method avoids the violent, single impulse of traditional cannons.

The engineering is a delicate balancing act. While competitors like SpinLaunch subject payloads to forces upwards of 10,000 Gs, Longshot is engineering for a comparatively "gentle" ride of 500-600 Gs. This is still far beyond what most off-the-shelf satellites can handle, creating a new market for ruggedized components, but it significantly widens the scope of what can be launched kinetically. The trade-off for lower acceleration is a longer barrel—much longer.

The company's progress has been methodical. An early 70-foot prototype in Oakland has already fired projectiles at over Mach 4 in more than 100 tests. Now, leveraging its new capital, Longshot is building its next-generation "minigun" in a repurposed U.S. Navy cannon testing facility in Alameda. This 180-foot-long, 30-inch-diameter behemoth is set to become the largest operational ballistic device in the world, a crucial step in validating the multi-injection technology at scale. The ultimate goal for this phase is a 500-meter-long test gun in the Nevada desert, designed to propel 100-kilogram payloads past Mach 5.

The Hypersonic Imperative

While the long-term vision is orbit, Longshot’s immediate business case is firmly terrestrial and strategically vital. The global race for hypersonic capabilities—vehicles and weapons that travel at over five times the speed of sound—has created a critical bottleneck: a severe lack of affordable, high-frequency testing facilities. The Pentagon and its contractors currently pay upwards of $6 million to $8 million per flight for hypersonic tests, which are often limited and infrequent.

This is where Longshot’s ground-based system presents a disruptive advantage. The company projects it can offer Mach 5 test launches for around $150,000, a price point that could transform hypersonic research and development from a sporadic, high-stakes endeavor into a routine, iterative process. This value proposition has not gone unnoticed. The U.S. Air Force has backed the company with millions in Small Business Innovation Research (SBIR) and Tactical Funding Increase (TACFI) awards, signaling deep strategic interest.

The addition of industry veterans like Mark Bigham, former Chief Innovation Officer at defense giant Raytheon, to lead government strategy further cements Longshot's alignment with national security priorities. By serving the urgent needs of the defense sector, the company can generate revenue, refine its technology, and build a track record of reliability—all while marching toward its more ambitious space-faring goals.

The Economics of Orbit

If Longshot can master hypersonic testing, the next logical step is to point the barrel higher. The company’s ultimate ambition is a system capable of orbital launch, which would require a gun stretching 10 to 15 kilometers (around 12 miles) and capable of accelerating payloads to Mach 23. The projected cost savings are staggering. While SpaceX’s workhorse Falcon 9 launches for roughly $3,000 per kilogram, Longshot is targeting a price of just $150 per kilogram, with some estimates suggesting costs for inert mass could plummet to as low as $10 per kilogram.

"The team has demonstrated exceptional technical execution, clear progress against ambitious milestones, and the potential to create an entirely new category of launch infrastructure," noted Aditya Agarwal, General Partner at South Park Commons. This investor conviction is crucial in a field crowded with giants like SpaceX and agile upstarts like Rocket Lab. Longshot isn't trying to build a better rocket; it's trying to make rockets partially obsolete for a certain class of payload.

However, the path is not without challenges. Payloads must still be custom-built to survive the launch, and the current 100-kilogram payload limit restricts its use to smaller satellites. Furthermore, a kinetic launch only provides the initial velocity; a small, integrated rocket engine, or "kick stage," would still be needed for final circularization and precise orbital insertion. The model hinges on whether the profound cost savings are enough to convince satellite operators to redesign their hardware for a cannon shot into space.

From Hangar to Horizon: The Long Road Ahead

Before Longshot can reshape the space economy, it must navigate a complex web of terrestrial regulations and environmental considerations. The move to the Nevada desert is not just for space; it’s a necessity driven by safety, noise, and the use of highly combustible hydrogen gas to achieve higher velocities. The sonic boom from each launch will require remote locations, and the construction of a future 12-mile orbital gun will involve land acquisition and environmental impact assessments on a monumental scale.

The company is already engaging with regulators, with approvals from the Federal Aviation Administration (FAA) pending for its Nevada facility. How regulators classify and manage this novel form of launch will set a precedent for the entire kinetic launch sector. The investment from South Park Commons provides not just capital, but a vote of confidence that these immense engineering and logistical hurdles are surmountable. Longshot is betting that a ground-based solution, despite its own massive infrastructure needs, is ultimately a more scalable and sustainable path than continuing to throw away or expensively recover multi-story rockets for every launch. The company is positioning itself not merely as a launch provider, but as the potential builder of a foundational piece of future aerospace infrastructure.