[Brad from Tennessee]

I got to fire a quad-fifty one time in Vietnam. It was sitting on the highest point of a hill in the center of a combat base so it could be directed at any part of the perimeter that might be breached by the dinks. It was mounted on a towed trailer. They would preregister the thing to fire H&I at different points on the map at night. I was part of a reactionary squad one night. It was good duty because you got to sleep all night. Our position was next to the quad-fifty. One of the crew that manned it let me fire a burst. That was done by depressing a button on a switch box. It was a rush.

[NewRomeTacitus]

One of my favorite stories is how Carlos Hathcock modified a .50 in order to take out a particularly loathsome sniper. Hence the Barrett was developed, winning hearts and minds in Afghanistan, Iraq and wherever legs need to be running without their torsos.