US marine corps tanker told me that 12,7mm (M2HB) rips through BMP the iraqis had. i think these were BMP1 mainly...don´t know how the PT76 compares to BMP1 reg. armor.
Were there already SLAP .50 rounds around in the Gulf War?
Anyway, Alpha, what do you consider as "ripping through"? At which distances and angles, on which parts... ?
AFAIK the Iraqis had mainly if not only BMP-1s, but the baselilne BMP-2 doesn't seem to be such an improvement in terms of steel armour.
And I don't see a way of comparing the PT-76 and BMP-1 in terms of design, since there are some 15 years between both; PT-76 is on the same basis as the BTR-50 though.