Amended 01 Apr 2019: The RFI is amended to include clarification on the programs/systems related to the attached documents. The notice details below, and the attached RFI document are updated. This notice is unrelated to the competitive Small Business Set-Aside Source Selection for the Multiple Award Contract for Modifications issued by this contracting office. The anticipated work covered under this indefinite delivery vehicle would be for that work which is considered proprietary and sole-source to Sierra Nevada Corporation. The deadline to respond is unchanged. The Government is conducting market research to identify potential sources that possess the expertise and capabilities for unique modernization and sustainment of the SOF/PR C-130 weapon system to include efforts such as hardware and software design, development, integration, test, sub-system and structural component production, and installation of future modifications and enhancements to the SOF/PR C-130 weapon system as well as product support. The level of security clearance and amount of foreign participation in this requirement has not been determined. The Government does not currently own or have access to the complete technical data package necessary to perform this work; therefore, the Government has determined that this effort is not competitive due to unique nature of the potential work. This Request for Information pertains all modifications, installations, kits, and engineering services that are proprietary to Sierra Nevada Corporation which includes, but is not limited to, the Precision Strike Package (i.e., the Mission Operator's Pallet, the Ballard Box, the Standoff Precision Guided Munitions (SOPGM) Door) and its controlling software, Airborne Mission Networking system, MC-130J Link 16, AC-130 Mission GPS System, etc. Original Notice Details: The Government is conducting market research to identify potential sources that possess the expertise and capabilities for unique modernization and sustainment of the SOF/PR C-130 weapon system to include efforts such as hardware and software design, development, integration, test, sub-system and structural component production, and installation of future modifications and enhancements to the SOF/PR C-130 weapon system as well as product support. The level of security clearance and amount of foreign participation in this requirement has not been determined. The Government does not currently own or have access to the complete technical data package necessary to perform this work; therefore, the Government has determined that this effort is not competitive due to unique nature of the potential work. The Contractor shall furnish all material, support equipment, tools, test equipment, and services. The Contractor is responsible for providing, maintaining, and calibrating all support equipment required at their facility or a subcontractor's facility. Contractor furnished material or parts used for replacement shall equal or exceed the quality of the original material or parts. The Contractor shall manage all Government Furnished Equipment (GFE). The Contractor shall establish and maintain a stateside supply point operation that includes material storage, distribution, spares replacement, document control, and parts issue and delivery. This will be a sole-source acquisition to Sierra Nevada Corporation (SNC), CAGE: 4EXW5. The supplies and services are available from only one (1) responsible source and no other supplies or services will satisfy the agency requirements. Interested persons may identify their interest and capabilities. All potential offerors should contact the Buyer/PCO identified below for additional information and/or to communicate concerns, if any, regarding this acquisition. This Request for Information (RFI) is for planning purposes only and is not a Request for Quotations or Proposals. No solicitation document exists, and a formal solicitation may or may not be issued by the Government as a result of the responses to this RFI. The Government will not be liable for payment of any response preparation expenses nor does the Government intend to pay for the information submitted in response to this posting. Contractors/Institutions responding to this market research are placed on notice that participation in this survey may not ensure participation in future solicitations or contract awards. Interested parties are responsible for adequately marking proprietary or completion sensitive information contained in their response.