The Department of Defense, specifically the Department of the Navy, has issued a Combined Synopsis/Solicitation notice for an engineering change proposal (ECP) to upgrade the off-road suspension of the M870A2-S Medium Heavy Equipment Transporter. The objective of this project is to modify the M870A2-S to an on/off-road variant (M870A2-OR) capable of line-haul transportation of equipment, supplies, and current Marine Corps Engineering Vehicles/equipment with payloads up to 37.5 tons in all terrain environments. The service/item being procured is an upgrade to the suspension system of the M870A2-S to enhance its off-road capabilities.