Source: Various (wot-news, world-of-ru, Wladimir S.)

If you are wondering about the red parts on some models, red is the replacement color for missing texture.

Chaffee – stock turret, stock gun (75mm M6)

Chaffee – elite turret, elite gun (75mm M17)

M5 Stuart – stock turret, 37mm M6

M5 Stuart – elite turret, 37mm T16

M3 Lee – 75mm M2

M3 Lee – 75mm M3

KV-1S – stock turret, 76mm ZiS-5

KV-1S – elite turret, 85mm S-31

KV-1S – elite turret, 122mm S-41

KV-85 – stock turret, 85mm D-5T

KV-85 – elite turret, 100mm S-34

KV-85 – elite turret, 122mm D-2-5T

T-34 – stock turret, 76mm L-11

T-34 – stock turret, 76mm F-34

T-34 – elite turret, 57mm S-54

T-34 – elite turret, 76mm S-53

T-34-85M

ISU-152 – 122mm BL-9S

ISU-152 – 152mm BL-10

RU-251 – 90mm Rheinmetall DM1

Jagdpanther – 75mm L/70

Jagdpanther – 88mm L/56

Jagdpanther – 88mm L/71

Jagdpanther – 105mm L/52

Misc.