StormBreaker warhead, pictured in a 2020 test. (Photo: Raytheon) Raytheon will deliver GBU-53/B All-Up Round test vehicles and other equipment by April 2023. Raytheon Missiles & Defense will conduct integration and test work on the GBU-53/B StormBreaker precision-guided glide bomb (previously known as the Small Diameter Bomb II) under a $79.4 million sole-source contract from the Air Force Life Cycle Management Center. The company will deliver All-Up Round (AUR) test vehicles, perform AUR-level assembly, checkout, testing and systems integration testing; and prepare multiple engineering changes such as National Security Agency cryptographic modernisation, GPS military code, mitigation of part obsolescence, and design changes evolving from production and/or operations.