This is a sole-source procurement for 43 units of NSN 7R-5925-015378655-KB, with delivery FOB origin. The item requires Government source approval, and only previously approved sources have been solicited; new sources must submit a Source Approval Brochure, but approval may not be processed in time for award. The Government intends to negotiate with only one source under FAR 6.302-1, though all responsible parties may submit capability statements. This notice is not a request for competitive proposals, and early or incremental deliveries are acceptable.