The U.S. Space Force (USSF) is seeking proposals for the Space Based Interceptor (SBI) Level of Effort 2M through a Request for Prototype Proposal (RPP) under the Department of Defense. This initiative focuses on developing kinetic midcourse solutions, with the intention to competitively award multiple fixed-price Other Transaction Agreements (OTAs) in accordance with relevant U.S. Code provisions. The SBI program is critical for enhancing the U.S. defense capabilities in space, and while this opportunity is not set aside for small businesses, participation from small and disadvantaged businesses is encouraged. Interested companies must submit requests for access to the RPP Bidders Library by December 15, 2025, and can contact Brent Jorgensen at brent.jorgensen.1@spaceforce.mil for further information.