This requirement is for NSN 1R-1680-015285408-V2, Ref 901-033-774-103, quantity 17, with delivery FOB origin. The part's design is unstable, with major changes contemplated that will make the current configuration obsolete. The item is flight critical and requires Government source approval prior to award; only previously approved sources have been solicited. The Government intends to negotiate with only one source under FAR 6.302-1, but all responsible sources may express interest, with award contingent on meeting qualification requirements. Offers from unapproved sources must include all data required by the NAVSUP WSS Source Approval Brochure or they will not be considered.