NAVSUP Weapon Systems Support Philadelphia intends to sole-source the procurement of seven CYLINDER ASSEMBLY units to Sikorsky Aircraft Corp, the Original Equipment Manufacturer and only known source due to the government's lack of data or rights to purchase from other suppliers. All responsible sources may submit a capability statement, proposal, or quotation for consideration, but the government expects to award to Sikorsky. Firms not already approved to manufacture this material must submit a Source Approval Request, though the procurement will not be delayed for SAR approval. Proposals received within 45 days of this synopsis will be considered, but this is not a request for competitive proposals. No budget amount or performance location is specified.