The 5.7 cartridge itself is not necessarily armor penetrating, unless it is specifically the SS190. The SS190 does have heavy restrictions though, just like any other AP round. The ones you are sold are not the SS190 unless they have the black tip and are labeled as AP.
In other words, save your money if you only want it because you think that it will penetrate someone's body armor. It is a sweet gun if you want it for other purposes though.
Not entirely true. While the ss195 and ss197 ammo does not go through soft armor, some of the protector series rounds offered by EA will defeat soft body armor.