Medium Tactical Vehicle Replacement (MTVR) or 7-Ton, is a six-wheel drive all-terrain vehicle used by the United States Marine Corps and United States Navy. It is designed to replace the old M939 tactical trucks, and was first fielded in 1998, after the contract was awarded to Oshkosh Truck Corporation. The MTVR comes in several variants, for a wide spectrum of tasks. It offers a major improvement in offroad capability.