With the aging infrastructure of America’s Minuteman III intercontinental ballistic missile force, the U.S. Air Force now faces an additional challenge: outdated transportation vehicles essential for moving missile warheads and other critical components.
The Air Force is actively seeking to procure new armored transporters to update the existing Payload Transporter III (PT III) fleet. The new model, known as the Payload Transporter Replacement (PTR), aims to address the issues of outdated parts, the age of the fleet, rising maintenance costs, and current security requirements. This initiative is laid out in the Air Force’s Request for Information (RFI), with responses due by March 12.
The Air Force plans to acquire five additional PTRs. Previously, Armorworks secured a five-year contract in 2019 to deliver 25 PTRs.
Although most technical details of the RFI are classified, the PTR is described as a large tractor-trailer, armored for special protection, and equipped with an auxiliary power unit. “The PTR is the sole platform for the transport of Aerospace Vehicle Equipment (AVE) to/from host bases to ICBM launch facilities (LF), and the sole platform for conducting AVE remove and replace operations while positioned over the LF,” the RFI states. AVE includes the Reentry System, Missile Guidance Set, and the Propulsion System Rocket Engine.
Armorworks characterizes the vehicle as having “an armored cab and a blast- and forced entry-resistant cargo containment system to inconspicuously transport nuclear missile cargo in a controlled environment on air-cushioned pallets.”
Contractors interested in responding to the RFI must demonstrate expertise in military-grade ballistic armor design, shock and vibration testing, as well as nuclear-certified design development. They should also detail their experience in managing engineering changes impacting nuclear-certified designs.
The transport vehicle issue is part of a broader set of challenges confronting the fleet of 400 Minuteman III missiles, which has been operational since 1970. A Government Accountability Office report from September 2025 outlines persistent problems such as parts obsolescence and aging support infrastructure.
Efforts to replace the Minuteman have faced hurdles, from the MX Peacekeeper in the 1980s to the current LGM-35A Sentinel program, which has encountered design and budgetary issues. As a result, the Minuteman may continue to serve as the U.S.’s primary land-based ICBM until potentially 2050, according to the GAO.
