In the same way, most countries uses now the 5,56mm NATO ammunition for their assault rifles. But Switzerland uses 5,6mm (0,04mm that make the difference). Swiss assault rifles have been made in order they can fire the 5,56 mm as well, but US M16 or french FAMAS cannot fire the swiss 5,6 mm. And with his former assault rifles, Switzerland did use 7,5 mm that is still in use for machine-guns. Switzerland has many weapon manufacturers and a great history in making weapons. Swiss army ever used Swiss made weapons as main individual weapons, however they used american and german equipment as well, like Browning machine-guns or Heckler & Koch sub machine-guns.
7,62 mm NATO standard is still largely used with the AK47 assault rifle around the world.
Swiss army knife is the main weapon against bred and cheese only. :-D