Mack Defense, a subsidiary of Mack Trucks, has received an initial order for 86 M917A3 heavy dump trucks from the U.S. Army as part of a new five-year contract valued at up to US$221.8 million.

The order is the first under the contract awarded June 24, covering up to 450 trucks, and follows the completion of Mack Defense’s original seven-year contract signed in 2018.

“We are proud to continue supporting the U.S. Army with proven, reliable vehicles tailored to the demands of military operations,” said Derik Beck, senior director of sales, business development and marketing at Mack Defense, in a news release. “Leveraging a commercially proven platform like the Mack Granite allows the Army to benefit from an established supply chain, proven durability and easier lifecycle support across a wide operational footprint.”

The M917A3 is modified with all-wheel drive, heavier-duty rear axles, increased ride height, and ruggedized features for tactical use. Each truck is also equipped with modern control systems, ABS and advanced safety technology, the company said in the release. The trucks are built at the Mack Experience Center in Allentown, Pa., where a dedicated production line was established in 2021.

Funding for the first 86 trucks comes from the 2025 Department of Defense budget. The vehicles will support infrastructure and construction efforts such as airfields, roads, landing strips, supply facilities, and motor pools.