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40 mm round testing


40 mm round testing

A muzzle blast from a 40-millimeter instrumented barrel is visible on a control room closed-circuit television screen during a test at Eglin Air Force Base, Fla. The 780th Test Squadron guns and missiles test flight developed a safe method to repurpose 80,000 of the WWII-era rounds with upgraded, safer fuzes. The unit successfully tested the refused cartridges on the Eglin range this summer. Modernized PGU-9D/B 40 millimeter rounds are presently and exclusively used on AC-130U gunship aircraft. (U.S. Air Force photo/Ilka Cole)

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