The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of the "16--EXTENSION ASSY, MAIN," which is categorized under helicopter rotor blades, drive mechanisms, and components. This is a sole source requirement, indicating that the government does not possess sufficient data to contract with any source other than the current approved supplier, necessitating Government Source Approval prior to award. Interested vendors must submit the required documentation as outlined in the NAVSUP WSS Source Approval Brochure, which is available online, to be considered for this contract. For inquiries, potential bidders can contact Lauren Phillips at 215-697-6566 or via email at lauren.n.phillips@navy.mil.