T-104 is the Latest Tank which balanced Firepower, Protection, Mobility and Production Costs.

T-104 is designed for Urban Combat and Close-Range Combat, actually it also able for Long Range Combat but it definitely need a New Sight for long range targeting.

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Targeting and Aiming

In fact, T-104 is only equipped with a Very Simple Sight that only have a small Crosshair in the middle.

*(Example of the Sight, it doesn't have much Markings for Aiming)

So T-104 is not very suitable for Aiming the target from Far Away;
However if the Sight get replaced with Better One, the problem will be solved solved.

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Firepower

Although the Bad Aiming System gave a Big Impact to the Cannon, however the Firepower still shouldn't be Underestimated.

The 125mm Cannon have a Ridiculous Loading time that it only Takes 3.5 seconds to reload, thanks to the Advanced Auto Loading system.

This 125mm Cannon will shoot ADFSDS and APCBC.
ADFSDS have 1734m/s Muzzle Velocity, it used for Against Heavily Armoured MBTs.
APCBC have 880m/s Muzzle Velocity, it can used for Against Medium to Light Armoured Vehicles.

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Protection

T-104 have Composite Armour in the Front hull and the Turret.
The Hull Armour is 62° Angled, the Lower Hull Armour still have around 79°.
Basically it required a very strong Cannon to Shoot through this armour.

However the enemies can give up on trying to pen through the Front Turret Armour, it have roughly 450mm Armour on it and it's Sloped.

T-104 also have Compartmented Ammo in the Back of the Turrent and Hull, destroying T-104 by Ammunition Detonation is 89% impossible unless the Protection Door get destroyed by the Projectile before detonate the Ammo Rack.

However, the Fuel tank doesn't Compartmented, if the Fuel Tank get lighted up the Crew have to Against the Fire with Special Fire-Fighting Equipments.

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Mobility

T-104 have Good Mobility just like it's predecessor: T-103, Good Turning Speed and Good Turret Rotating speed but it will not better than T-103.

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Production Cost

T-104 have less Production costs, it's engine won't need too much tech for it, as the Engine have Upgraded; which is more Efficient that it won't eat too much Fuel.

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Others Good things about this MBT

T-104 have simple controls ,which mean it have less Repairing Cost and doesn't need Too much skills to drive.

T-104 can't be easily destroyed, it can Simply repaired and Back to Combat.

T-104 can be easily Upgrade, or even replacing some of the Parts. It can reduce the Cost if there's some Part that the Buyer doesn't need, for example: The Cannons and The Gun

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The Cons

T-104 have smaller profile because it only have 2.6m of Height (without the "sticks" and gun pod), may not comfortable for the crew to Fight for a Long Time. Or it might need some costs to buy some Ergonomics things to solve it.
(This is stock version of T-104)

T-104 have bad scope, buyer might need to spend more costs to change it.

T-104 is heavier, so the performance will worse than T-103.

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Full Information

Weapons

125mm Cannon
Reload time: 3.5s
Elevation: around -5/15°
Projectiles: ADFSDS & APCBC
Muzzle Velocity: 1734m/s & 880m/s
Penetration(estimated): ~650mm/245mm

20mm MG
Elevation: around -5/15°
Muzzle velocity: 900m/s

Other equipment

Chaff and Flares
Ammo: 8 rounds

Amour T H I C C N E S S

(Hull)

Front armour:
Upper: ~200mm @62° (Llos=~426mm)
Lower: ~80mm @79° (Llos=~419mm)
Side armour:
~150mm @90°
Rear armour:
~80mm @~35°

(Turrent)

Front armour:
~400mm @~-45/45° (Llos=~565mm)
Side armour:
~280mm @90°
Rear armour:
~280mm @90°
(Llos: Length line of sight, means the actual thickness of the armour when you aim the armour at same level (Reference from War Thunder Wiki))

Performance

Top speed: ~81km/h ~44kn ~50mph
Turning speed: ~7.25s per 360°
Turrent rotate speed: ~8.5s per 360°

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Damage model

(Original from "Noffy" (Nofferston))
Front
Upper hull: 7500
Lower hull: 2000
Turrent: 13000
Side
Hull: 2500
Turrent: 8000
Rear
Hull: 1500
Turrent: 8000

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Controls

VTOL: Forward and Backward
Brake: Brake
Yaw: Turning
Roll: Turrent Rotate
Pitch: Cannon and Guns Elevation

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Prices

240k USD

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In the end

Thanks for Noffy (Nofferston) , if without him I will never able to know about how to make damage models.
In fact, his remake on my T-103 MBT have gave me some more inspiration for Making MBTs. (Although that T-103 kinda too small compare to the original size :3)

Once again,

Thx Noffy :3