A large amount I believe. Gaijin believes the whole underside of the mantlet modeled like it’s sheet metal with a 25.4mm flat rate. It’s really like 6" thick at the smallest point but I don’t have “proof”
It should be something like this all around the lower mantlet except for where the gun itself is
The devs/mods are clearly coping. Turret ring is still not volumetric after years lmfao. They fixed the Arena’s volumetric armor the day after it was on the live server. Such beta energy from them
Wish I had contact info for Spookston, between this, the bugs I’ve already reported, and my post on the HSTVL/RDFLT missing 100mm of pen, should really be brought to attention.