The U.S. Army is seeking commercial railroad flatcar design and production services to replace its aging DODX 40000-Series heavy-duty flatcars, which face mandatory retirement starting in 2031. The new flatcars must be capable of carrying two 72-ton M1A2 Abrams tanks or equivalent heavy tracked vehicles on a single deck, with design flexibility for potential vehicle weight growth. The Army is requesting industry feedback on several low-risk design concepts, including modernized single-deck and drawbar-connected configurations, as well as an open design for unconsidered alternatives. This is a Request for Information to foster a competitive future Commercial Solutions Opening, with responses due by 17:00 EST on 05 June 2026. No budget amount or performance location is specified in the description.