Following the initial development contract awarded last year, Mack Defense has been awarded the contract to produce two prototype vehicles for the next phase of the Medium Tactical Truck (MTT) program with the U.S. Marine Corps. 

The new family of 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.

“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.”

MTT Development Requirements

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, enabling the vehicle to traverse deep water typically encountered during Marine Corps missions. 

The prototype phase includes the development of two variants: 

• 4x4 configuration featuring a 10-foot cargo bed

• 6x6 configuration with a 20-foot cargo bed

The trucks share DNA with the Mack Granite but are specially designed to meet the specific requirements of the U.S. Marine Corps. The MTT prototypes incorporate significant technological advancements in driver safety and operational capability. 

These include advanced driver assistance features such as collision avoidance, blind-spot detection, and vehicle dynamic control systems incorporating enhanced traction control and anti-lock brakes. 

Hybrid-Electric Military Trucks

The vehicles also 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.

Built for Off-Road Mobility

The MTT program emphasizes enhanced off-road mobility with vehicles designed for cross-country operation while maintaining optimal weight for improved fuel efficiency and payload capacity. The purpose-built design incorporates an open systems architecture that enables future autonomous capabilities and technology integration.

Production & Testing Schedule

Construction of the prototypes will begin in the second half of 2025, with completion targeted for early fall. Following assembly, the vehicles will undergo comprehensive contractor performance testing at the Nevada Automotive Test Center (NATC) in the first half of 2026 before delivery to the Marine Corps.