Kratos Defense & Security Solutions is adding one of the largest laser powder bed fusion machines on the market to its hypersonics operation. According to VoxelMatters, the company has acquired an AMCM M 8K, an eight-laser, large-format metal system from the EOS subsidiary, and will install it at its Indiana Payload Integration Facility (IPIF) in Odon, Indiana. The site sits near Naval Surface Warfare Center, Crane Division, and the stated goal is blunt: build hypersonic hardware faster and test it more often, at lower cost.
It is a single machine purchase, but it says a fair amount about where large-format metal additive manufacturing is heading, and who is paying for it.
The Machine
The M 8K is not a scaled-up desktop-class metal printer in any meaningful sense. Its build envelope is 800 x 800 x 1,200 mm, which is tall enough to print a part well over a meter long in one piece. Eight 1.2 kW lasers share that field. AMCM's own March 2026 press release specifies those as US-made nLIGHT units, and says the machine moves up to four tons of powder along the Z-axis.
Raw laser power is the easy part of the spec sheet to quote. The harder engineering problems in a build chamber this size are heat and gas. A powder bed that tall accumulates a great deal of thermal energy over a long job, and eight melt pools throw off spatter and condensate that has to be cleared from the laser path before it degrades the next layer. AMCM addresses that with what it calls AirSword gas flow technology, which it says provides uniform gas flow across the whole build area and eliminates laser-smoke interaction, along with a cooling architecture it says holds up even with demanding materials such as copper alloys. The company also lists Dynamic Scan Fields, which concerns how the eight lasers divide the work across the bed, plus advanced beam shaping, filtration and in-process monitoring.
Copper is worth noting. Copper alloys conduct heat very well, which is why they show up in rocket combustion hardware, and also why they are hard to print: they reflect laser energy and pull heat away from the melt pool quickly. A machine designed to handle them suits propulsion hardware. AMCM says the M 8K is aimed at mission-critical components including rocket engines and missile structures.
The lineage fits. VoxelMatters reports the M 8K was originally developed in cooperation with ArianeGroup, the European launch vehicle maker, and TCT Magazine notes it was first introduced in 2023 and built specifically for space and defense, combining thermal management, process gas flow, filtration and monitoring for large, high-performance metal components.
Why Kratos Wants It
Hypersonic development has a cadence problem. Every flight test teaches engineers something, but test articles are expensive and slow to make, so the number of shots per year tends to stay low. Kratos describes its aim as low-cost, high-cadence testing, the same goal it ties to programs like MACH-TB.
Mike Johns, senior vice president of Kratos SRE, framed the purchase in exactly those terms. In the statement carried by both VoxelMatters and TCT, he tied the M 8K to the flexibility, precision and responsiveness needed to rapidly field advanced hypersonic systems, and to the low-cost, high-cadence testing that programs like MACH-TB require. Martin Bullemer, managing director of AMCM, said Kratos is making a significant investment in the future of aerospace and defense manufacturing.
The underlying logic is familiar to anyone who has replaced a machined bracket with a printed one, just at a vastly different scale. Large monolithic metal parts printed in a single build can collapse what would otherwise be multi-piece assemblies, cut out tooling, and shorten the loop between a design change and a part ready for the next test. When the product is test hardware rather than a high-volume production line, tooling and lead-time savings carry outsized weight.
Not the First M 8K Buyer
Kratos is not the first customer. According to AMCM's March release, the American Center for Manufacturing and Innovation (ACMI) was the first organization worldwide to acquire an M 8K, and VoxelMatters reports ACMI will be the first to install one. VoxelMatters adds that ACMI also acquired an EOS M4 ONYX and an AMCM M 290-2 FLX, and will make the technologies available to aerospace and defense contractors to bridge the gap between R&D and industrial production.
The more telling detail comes from Felix Bauer, AMCM's sales director. He told VoxelMatters that AMCM's base was mainly in the space industry, but that within the last three years the business has been moving toward defense. He says the shift is not driven exclusively by the big primes; the company is also seeing startups and smaller companies that use additive manufacturing from the get-go.
That matters. A machine that began life in cooperation with a European launch provider is now finding customers in US defense and hypersonic work, and not only among the biggest names in the industry. VoxelMatters also notes that AMCM's large-scale metal systems, all based on EOS architectures, have been increasingly adopted in the United States, particularly for defense.
What It Means for Makers
Nobody reading this is going to put an M 8K in the garage. A system that moves powder by the ton and runs eight 1.2 kW lasers belongs to a different universe from a desktop FDM printer or even a benchtop resin machine. But the purchase is a useful signal for anyone tracking the wider industry.
First, the momentum in large-format metal printing is increasingly coming from defense. That shapes which features get developed and which materials get attention. Gas flow, thermal control and in-process monitoring are being refined for parts where a hidden defect has real consequences, and process knowledge of that kind tends to spread well beyond the programs that paid for it.
Second, the problems are familiar ones scaled up. Warping from uneven heat, contamination in the build volume, keeping multiple heat sources from interfering with each other: makers who run enclosed printers or multi-toolhead setups wrestle with versions of the same issues. AMCM itself says scaling this process to a meter and beyond has long posed challenges in maintaining consistent gas flow and part quality, a reminder that build size is rarely limited by motion systems alone; heat and airflow usually set the ceiling.
Third, the shift Bauer describes, with startups and smaller firms using additive manufacturing alongside primes, suggests the customer base for very large metal systems is broadening. For engineers and makers interested in working in additive manufacturing professionally, that is where the demand appears to be heading.
Bottom Line
Kratos is betting that an eight-laser, meter-plus metal printer in Indiana will help it build and field hypersonic test hardware more often and more cheaply. With ACMI also buying an M 8K and AMCM openly describing a move from space toward defense, the M 8K is becoming a marker of where high-end metal additive manufacturing is being pulled.
