[NerdDad]

>>In fact, the same Marines who carry the beefy .45s also carry MP-5 submachine guns that shoot 9 mm rounds. But when firing those submachine guns, they shoot “double-taps,” or two squeezes on the trigger, to ensure an enemy soldier is hit with a massive amount of lead. <<

My knowledge of the MP-5 is somewhat limited but my understanding is that it has 3 fire modes -- single, double tap, and full auto. It would not be necessary for the shooter to pull the trigger twice with the fire mode properly selected. I would bet the Marines keep it on double tap.

[gundog]

The MP-5 is also available in 10mm if ya really wanna hurt somebody(not just scare little Cuban kids).

[Atlas Sneezed]

MP5 "double tap" would properly be called a two-round burst. A skilled shooter (and these are rare) can quite reliably get a two round burst from a full auto, but undoubtedly the two round burst is what is referred to in the article.

That said, my preferred sidearm would probably be this: