The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 80 units of a night vision adapter (NSN 7R-5855-016147970-QE, REF NR 720100-04-02). This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals, as the technical data required for full and open competition is not adequately available. Interested parties must provide detailed documentation as outlined in the NAVSUP Source Approval Information Brochures, and proposals must be submitted within 45 days of this notice, with the primary contact for inquiries being Hayden Young at (215) 697-2928 or via email at HAYDEN.J.YOUNG3.CIV@US.NAVY.MIL.