The Department of Defense, through the Marine Corps Systems Command, is seeking vendors capable of providing engineering change proposal (ECP) support for the Amphibious Combat Vehicle (ACV-30) Turrets, specifically the Kongsberg Defence & Aerospace PROTECTOR Series Remote Turret – 20 (RT-20). The procurement aims to identify qualified contractors who can offer expertise in turret sustainment, prototyping, testing, and logistics updates, ensuring the operational readiness of the ACV-30 Turrets from Q3 2026 to Q2 2028. This initiative is crucial for maintaining and upgrading the capabilities of the ACV-30 platform, which plays a significant role in the Marine Corps' tactical operations. Interested parties must submit their responses, including an executive summary and a detailed capabilities white paper, by December 19, 2025, to Kendel Phillips at kendel.phillips@usmc.mil.