The Air Force’s decision to award the contract to Fairchild Republic—which went on to build the A-10 Warthog—proved to be one of the greatest decisions Pentagon acquisitions experts have ever made.
The M134 GAU-17 “Vulcan” cannon is a six-barreled ... In 1956 the gun was standardized as the M61 20mm cannon and entered service with both the United States Army and Air Force.