The Department of Defense, through the Naval Surface Warfare Center (NSWC) Crane, is seeking proposals for the design and production of specialized flat railcars, specifically engineered for transporting Active Inert Missiles. This procurement is critical as the current fleet of flatcars is set to reach the end of its operational life by July 1, 2031, necessitating the development of new railcars to maintain uninterrupted transportation capabilities. The contract will be awarded on a full and open competition basis, with a firm-fixed-price structure over a five-year indefinite-delivery, indefinite-quantity (IDIQ) framework. Interested vendors must submit proposals by the closing date of October 27, 2025, and are encouraged to contact Steven Junkins at steven.l.junkins2.civ@us.navy.mil or 812-381-7148 for further inquiries.