Sole source procurement for 5 units of NSN 1R-5995-016912189-BL, with delivery on a FOB origin basis. The government lacks sufficient data to contract with sources other than the current manufacturer, and these items are subject to Free Trade Agreements and WTO GPA provisions. This requirement mandates Government Source Approval prior to award; offerors not already an approved source must submit the data specified in the NAVSUP WSS Source Approval Brochure or their offer will not be considered. Questions should be directed to the provided Navy contact email. No budget amount or performance location beyond FOB origin is stated in this notice.