A good friend told me a free fire zone was what you would fly over in a slick with guys that didn't see action, and wanted to fire the M60 mounted on the pus..., er kitty-pole. The bolt of the '60 might be closed on an empty chamber, with a worn barrel not locked in place. They try to fire and experience no joy, then look around for guidance. The crew chief would motion for them to cycle the bolt. When they did, the barrel would fall to the ground. Said it was good for a laugh.
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