MM III Modifications

The MM III Modifications program is a line item in the Air Force's FY 2026 budget request, focused on sustaining and enhancing the operational capability of the LGM-30G Minuteman III Intercontinental Ballistic Missile (ICBM) weapon system. The overarching goal is to ensure the MM III fleet remains viable and reliable until the full deployment of the Sentinel ICBM system. This program addresses critical sustainment issues, mitigates risks from aging components, and supports both homeland defense and military support to civil authorities as mandated by Section 1815 of the FY 2008 National Defense Authorization Act.

Key objectives of the MM III Modifications line include addressing Diminishing Manufacturing Sources (DMS) and implementing capability improvements and service life extension initiatives. The program funds targeted upgrades and replacements designed to resolve specific reliability, maintainability, or operational challenges. The Air Force utilizes both procurement and research, development, test, and evaluation (RDT&E) funding, with RDT&E for most modifications contained in Program Element (PE) 0101213F and MEECN-related RDT&E in PE 0303131F.

Minuteman MEECN Modification is a major capability improvement effort, with FY 2026 funding supporting upgrades to the Minimum Essential Emergency Communications Network. This modification ensures robust, survivable communications for command and control of the ICBM force, a critical requirement for strategic deterrence. The MEECN upgrades are necessary to maintain secure and reliable communications in a contested environment, supporting both nuclear and conventional missions.

ICBM Cryptography Upgrade Increment II is focused on enhancing the cryptographic security of communications and control systems associated with the MM III. This upgrade is essential to counter evolving cyber and electronic warfare threats, ensuring the integrity and confidentiality of strategic communications. Previous investments have supported the development and fielding of advanced cryptographic modules, although no new funding is requested for FY 2026.

MM LCC Block Upgrades and MM III Auto Switching Unit (ASU) are service life extension projects aimed at modernizing the Launch Control Centers and critical switching components. These upgrades replace obsolete hardware, improve system reliability, and extend the operational life of the MM III infrastructure. By addressing aging and at-risk components, these modifications help maintain the readiness and effectiveness of the ICBM force.

Fast Rising B-Plug Service Extension Program (FRBP SLEP) and Low Cost Modifications represent targeted investments in specific missile subsystems. The FRBP SLEP focuses on replacing or refurbishing energy storage systems that are vital to missile launch operations, while Low Cost Modifications address smaller-scale reliability and maintainability issues across the fleet. These efforts are justified by the need to prevent mission degradation due to component failures and to optimize sustainment costs.

The FY 2026 request also includes a new start for the Arm/Disarm Switch Replacement (ADSR) program. The ADSR initiative is designed to develop, test, and deploy replacement switches for the aging arm/disarm units located at five critical points in the missile system. These switches are essential for completing or interrupting ordnance electrical circuits and are required for ongoing depot maintenance and analytical condition inspections. The program includes design, fabrication, and testing, with production and deployment scheduled to begin in late FY 2026. The Air Force has contracted Ensign-Bickford Aerospace & Defense for manufacturing, with installation planned for 116 units using organic maintenance resources.