DLA is conducting market research to identify potential sources for hardware, software, services, spares, and documentation supporting upgrades to the Qatar FMS PATRIOT program, with performance expected at Redstone Arsenal, Alabama. The government intends to procure this requirement through an existing RTX long-term contract under sole-source authority, identifying Raytheon as the only responsible source. Interested firms, including small and disadvantaged businesses, must meet prequalification requirements and seek source approval to compete for future solicitations. The selected contractor would bear all manufacturing, supply chain, logistics, and engineering responsibilities, including recurring and nonrecurring costs. This notice is for informational and planning purposes only and does not constitute a solicitation or commitment to award.