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by bell-cot 1738 days ago
This.

The M2 Browning .50 machine gun ( https://en.wikipedia.org/wiki/M2_Browning ) is more than a century old, and still very widely used. Originally, it was an anti-tank weapon...then tank armor got thicker. It became primary armament on fighter airplanes...then enemy fighters got faster and better-armored. Then it was...

Being very flexible and useful in current-day military operations is why the M2's still around. (Though being mostly below the radar of the US's stupid rival-service-branches politics, and always-gotta-have-new-shiny-stuff mentality sure helps.)