The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of two units of the Combiner, Aircraft, M (NSN 7R-6650-015854893-P8). This requirement involves a commercial/nondevelopmental item that is flight critical, necessitating government source approval prior to contract award, as the technical data available does not support full and open competition. Interested vendors must provide detailed documentation as outlined in the NAVSUP Source Approval Information Brochures, and proposals must be submitted within 45 days of the notice publication. For further inquiries, interested parties can contact Sara M. Hojnowski at (215) 697-2198 or via email at SARA.HOJNOWSKI@NAVY.MIL.