@Chinmoy
The turret less tank I said was in view of that, now a MBT can survive 120-125mm hit by other tank, it means Chinese MBTs and Pakistani ones are going to withstand 120mm hits successfully. A tank's main objective is to destroy other tank. For this purpose I said a turret less stank. Turret less tanks can mount heavier armament. So a turret less tank armed with a 200mm light weight gun. Now armours are becoming exceedingly hard to penetrate, for this reason this tank will rely on sheer blast impact of high velocity 200mm gun. The sheer blast concussion will immobilize the opponent tank. This 200mm gun will have large part of its barrel on rail, so that in case breaking wall, the other part can be be pulled back. Over this, there will a small rotating turret, armed with an AGS with 60 rounds, and ATGM launcher. Apart from machine guns.
In WW2 Soviet tanks were generally incapable of destroying German tanks and tank destroyers, but Soviet tank destroyers and Self-propelled guns like ISU-122 and ISU-152 had no problem.
Now a lightweight 200mm gun can be made, as lightweight 155mm Howitzer M777 has been made. The loading system will be automatic.