overrated ?

[PlasmaKrab]

What for a figure do you exactly use for 12.7 penetration?
Is 20mm a conventional asserted value, and if so, for which ammo type?

Besides, front slope is 10mm @80.5°, which makes 60.59mm of virtual steel, plus the bouncing effect, looks fine.

Now as good as I can recall from the various sources about this thing (pics, models, 3D...), the other plates you mention are at least inclined by some 30°, which gives 19.5mm on the lower front hull and 30mm on front turret, assuming the max armor thickness is on the front.

Looks just right, doesn't it?

Additionally, if you take out 1 armor point you will end up with it being only 7.62mm AP proof, am I right? The game engine cannot afford being accurate enough to discriminate that much between thin armours.

Now from the figures you quoted, I find 2 of steel armor is fine, at least on the front part.