The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of five units of a flight-critical receiver, identified by NSN 7R-5865-017083360-P8 and reference number 131K831G05. This procurement requires government source approval prior to contract award, as the item is deemed critical and the technical data available does not support full and open competition; only previously approved sources will be considered. Interested vendors must submit comprehensive documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and failure to provide the required data will result in disqualification from the solicitation process. For further inquiries, interested parties can contact Connor C. Lewis at (215) 697-4757 or via email at CONNOR.C.LEWIS@NAVY.MIL.