The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of three units of a flight-critical electronic countermeasure receiver, identified by NSN 7R-5865-017083360-P8 and reference number 131K831G05. This procurement requires government source approval prior to contract award, as the technical data available does not support full and open competition, meaning only previously approved sources will be considered. The successful offeror must provide comprehensive documentation as outlined in the NAVSUP Source Approval Information Brochures, and failure to do so will result in disqualification from the award process. Interested parties should contact Connor C. Lewis at (215) 697-4757 or via email at CONNOR.C.LEWIS@NAVY.MIL for further information, and they are encouraged to submit their proposals promptly to meet government requirements.