KV-5

The KV-5 is a retired Premium (from V7.5) Soviet Tier VIII Heavy Tank. However, it can still be used by players who have already bought it, and it might be made available again for purchase, either temporarily or permanently, in an unspecified future update. While its gun isn't all that great, its armour is briliiant and its turret has many awkwardly angled plates and curved surfaces to deflect shots. This allows it to easily turtle in a support role.