Russian MBTs seem to have way to much barrel armor compared to NATO MBTs.
Most, if not all, NATO MBTs have between ~150-500mm of equivalent protection when looking down the barrel. Generally, shots made here destroy the barrel along with the breech, sometimes penetrating into the fighting compartment like on the leopard 2s. On the other hand, Russian MBTs have minimum 900mm of equivalent protection, making it impossible to destroy the breech or penetrate the fighting compartment.
It just seems kinda unfair.
M1A2 SEP V2:
T90m:
Leopard 2a6 (Birds-eye after getting shot at 0°):
Update:
I did some more testing and I think I found the problem. The trunnions on Russian MBTs behave like solid pieces of armor despite being hollow cylinders so when you shoot down the barrel it reaches the trunnion and can’t pen.
T80:
DM53 seems to get stopped by nothing here ^





