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Following the initial development contract awarded last year, Mack Defense today announced the production of two prototype vehicles for the next phase in the Medium Tactical Truck (MTT) program with the U.S. Marine Corps. PHOTO/MACK DEFENSE
Mack Defense to build MTT prototypes for Marine Corps
Stacy Wescoe//May 19, 2025//
Mack Defense Monday announced it has won the contract to produce two prototype vehicles for the next phase in the Medium Tactical Truck (MTT) program with the U.S. Marine Corps. The news comes after the initial development contract awarded last year.
The new vehicles will replace the Marine Corps’ Medium Tactical Vehicle Replacement fleet (MTVR), which includes cargo, dump, wrecker, tractor and re-supply trucks supporting air-ground task force combat support missions.
According to a press release, the Marine Corps’ initial development requirements for the MTT fleet focused on cargo variants consisting of 10-, 15- and 20-foot cargo bed configurations with hybrid-electric technology for reduced fuel consumption, extended range and reduced noise for silent watch capabilities
A 70% off-road and 30% on-road mission profile will be supported by a 60-inch fording capability to traverse through deep water typically encountered during Marine Corps missions.
The prototype phase includes the development of two variants: a 4×4 configuration featuring a 10-foot cargo bed and a 6×6 configuration with a 20-foot cargo bed.
The trucks are similar to the Mack Granite but are specially designed to meet the specific requirements of the U.S. Marine Corps.
The vehicles feature hybrid-electric technology delivering improved fuel efficiency while enabling critical tactical advantages such as silent watch capabilities using extensive onboard power storage and generation and exportable power for other military systems.
“These prototypes represent the next generation of purpose-built, specialty vehicles for the Marine Corps,” said David Hartzell, president of Mack Defense. “By leveraging our commercial vehicle technology expertise and adapting it for military applications, we’re delivering a highly capable platform that can perform in the most challenging terrains, while incorporating advanced safety features and hybrid propulsion systems that meet the Marine Corps’ rigorous mission requirements.”
Construction of the prototypes will begin in the second half of 2025, with completion targeted for early fall.
