This is a sole-source procurement for NSN 7R-5855-015901553-QE, with a quantity of 80 units and FOB Origin delivery. Engineering source approval is required, and only approved sources retain the essential data rights or manufacturing knowledge, making alternate qualification subject to government-approved procedures. The government intends to solicit and negotiate with only one source under FAR 6.302-1, though all responsible parties may express interest and submit capability statements. This notice is not a request for competitive proposals, and award will be made only if the offeror or product meets qualification requirements at the time of award. The government is not using commercial item acquisition policies for this requirement.