The vehicles are its P-19R on-road/off-road trucks, which were chosen by the Marines last year to replace Oshkosh firefighting vehicles currently in use.
"We delivered three P-19R prototypes in December and will support them as they undergo rigorous government testing through this summer," said John Bryant, senior vice president of defense programs for Oshkosh Defense.
"The Oshkosh P-19R will replace the fleet of Oshkosh P-19A ARFF vehicles, which were first fielded with the Marine Corps in 1984 and are reaching the end of their service lives. With this vehicle, we've rolled into one platform our decades of experience producing military and ARFF vehicles to give Marines more advanced firefighting capabilities."
The new P-19R aircraft rescue and firefighting vehicle features independent suspension for off-road use and advanced Stryker firefighting systems.
Oshkosh gave no details as to the length of the testing program.