The turret is done, I'll be using the T-18XE3 turret, no it's not the BMP-2 turret, the T-18XE3 has a smaller turret than the BMP-2. And the Unmanned Turret IFV doesn't have an ATGM, but this time I'll be using a different mantlet, the circular mantlet.
The fictional turret will be called the "M402 Gun"

It has a estimated 75mm, so let's do the calculation of how big the penetration is.

Where B is the thickness of armour penetrated in decimeters, V is the velocity of the shell on impact, P is the mass of the projectile, and D is the projectile caliber. K is a resistance constant, which represents the quality of the armour and the capacity of the shell to penetrate it. When in doubt, use the value of 2400, which was the value for standard quality armour used in Soviet calculations.

The 75mm gun has a 15.7 kg shell and 4750 m/s.
It has a huge 885mm penetration. Take note that this is a fictional gun. Not real

And this is the turret, I will be making a loading animation.

It also has a horizontal stabilizers, I'll try to make a vertical one but if the tank gun is too light, then I maybe can't make one.