I'm from Switzerland and my oldest cousin is working as a weapons and ammunition specialist in the swiss army. They had to test those warheads before they went into mass production. They had an empty M1A1 hull and the RPG went straight thru it.
Although the warhead was a success, the army didn't have enough RPG 7 Launchers and so they sold the remaining warheads to a country with RPG 7 Launchers. Now those jerks in Iraq have them and they problably can't tell the difference between the piercing ones and the regular ones.
It's a shame to live in a country that helps terrorists to kill americans