The Department of Defense, specifically the Department of the Air Force, intends to award a sole source contract for the Altitude Combined Aircrew Systems Tester – High Altitude (ACAST-HA) to Chemring Energetics, located in Downers Grove, Illinois. This specialized equipment serves as an accessory to the JCAST, providing essential functionality for Pressure Breathing at Altitude (PBA) testing of specific Regulated Connectors used in Air Force operations. The ACAST-HA is critical for ensuring the operational readiness of the F-22 Mission Designed Series, as it is the only approved tester for this purpose. Interested parties can reach out to William Gentry at william.gentry.8@us.af.mil or Daniel Swoyer at daniel.swoyer.1@us.af.mil for further inquiries.