The U.S. Marine Corp. is testing 3D printed, bulletproof structures to protect marines and supplies anywhere they may deploy.

The Vulcan is an almost 4,000 lb 3D printer that prints layers of Lavacrete, which is a fast-curing polymer concrete, to quickly build structures to protect deployed personnel, equipment, weapons and supplies from enemy fire, weather and even radiation.

Capable of 3D printing structures up to 2,000 sq ft, the Vulcan’s capabilities were recently tested at California’s Camp Pendleton. There, marines used the Vulcan to 3D print a shelter to store a truck with a M142 High Mobility Artillery Rocket System (HIMARS) — a process that took just 36 hours.

The quick-drying Lavacrete reportedly dried within 12 to 24 hours of printing. Additionally, the Lavacrete has a strength rating of 6,000 psi, which means that the structures fabricated in the materials can withstand just about anything, including radiation.

The Vulcan is just one component of the Defense Innovation Unit (DIU) Construction Scale Additive Manufacturing effort wherein initiatives are being undertaken to expedite commercial technology into the Department of Defense.

To see the Vulcan print the structure at Camp Pendleton, watch the accompanying video.