>>>However, what’s misleading is, as current 7.62mm M80A1 is incapable of penetrating these body armors either – on the other hand with specialty tungsten cored ammunition in both 5.56mm and 7.62mm calibers are capable of penetrating armor of this type<<<
Kind of like replacing your Car because you don’t want to spring for the Synthetic Oil Change.
Armor development is now getting to the point that ballistic ammunition may be obsolete UNLESS we are carrying miniature rail guns around and considering the power requirements, that may not be plausible.
Laser rifles may seem science fiction now, but if you can’t penetrate armor with bullets...