Source: Platypusbill, Wotlabs
-The entire front except a tiny cupola is immune to sub-120mm AP/APCR.
-HEAT should only be used if you can’t overmatch with AP/APCR, the effect of the spaced armour is substantial. You can penetrate a narrow section along the middle with HEAT, but tracking and flanking it is a better idea unless terrain/other enemies prevent this.
-150mm+ guns can penetrate almost the entire front with AP/APCR.
-120mm+ guns can penetrate the entire LFP, but only a small part of the UFP, with AP/APCR.