In 1962– appropriate at six many years right after it was introduced– the previously rare and regular 9mm turned the NATO regular for handguns and submachine guns/PDWs and it has held on to that title at any time because. We're a participant in the Amazon Products and services LLC Associates https://redgearguru.com/history-and-review-of-the-556-nato-round-2/ammunition-bullets-ammo-ammo-bullets-ammunition-review-44/