The U.S. Army Contracting Command – Aberdeen Proving Ground, Orlando Division is conducting market research to assess industry interest and capability for a potential open season/rolling admission under the Live Training, Ranges, and Combat Training Centers (LTRaC) Multiple Award Contract (MAC) 3. LTRaC MAC 3 is a full-and-open, multiple-award indefinite-delivery, indefinite-quantity contract vehicle under NAICS 333310. It would support complex life-cycle support for live-training systems, including technology refreshment, modernization, developmental efforts, systems integration, fielding, sustainment, and related multi-site efforts. The vehicle supports U.S. Army and U.S. Marine Corps live-fire ranges, Combat Training Centers, HITS, STE-LTS, JPMRC-IS, and DRTS ranges, including Tier 2 Integrated Player Units and radio-frequency range-equipment technology refreshment. This is a Sources Sought notice for information and planning only, not a solicitation or commitment to conduct an open season or make additional awards; interested parties should review the attached notice for complete scope, requested capability information, and submission instructions.