While this has been leaked on some korean website , there are some other leaks where someone measured armoring  of the turret and it seems its extremely front biased with only 20 degree protected arc , i would expect the poles to ditch the side turret storage boxes for some armor packages 

How good is the tank we want? The Poles wanted to know and had the 16th Mechanized Division of the Polish Army prepare an assessment report with the K2 Black Panther main battle tank. The April 2023 document was not published anywhere in Polish, but the contents were leaked on a Korean website and have now been discovered by a Polish colleague . This is the Polish verdict on K2:

1. Excellent mobility – the K2 received the highest score in all maneuverability categories.
   – Local language support (Polish) and user-friendly interface.
   – When starting, the parts required for commissioning are automatically checked and can be started by simply preheating.
   – The tower can be rotated using an external power supply.
2. Excellent functionality for on-site maintenance.
   – Easily replace optical devices that can be damaged in battle.
3. Reduced combat fatigue for K2 tank crews.
   – The automatic loader allows ammunition to be loaded quickly in all conditions.
   – Hydropneumatic suspension reduces crew fatigue.
   – Excellent overview of the situation on the battlefield thanks to integrated monitors.
   – Easy to use coaxial weapon.
   – No hindrance when carrying your personal weapon.
   – Large viewing angle.
   – Suitable for combat day and night, over long distances or in bad weather.
4. Hunter-killer capability, i.e. fire control system - more than a generation better than Leopard, Abrams etc.

Need for improvement according to Poland:

1. The driver's hatch is small and awkwardly positioned.
2. Position of the 12.7mm secondary weapon on the turret is incorrect.
3. Unnecessary infrared radiation from the RCWS (? probably meant weapon station)

Conclusion: K2 Black Panther – the best tank ever!

This is a convincing verdict from the test force, especially if you want to order around 1,000 units and build a joint industry with the Korean to build the tanks in Poland and sell even more K2s across Europe in a row.

The actual side armor of the K2's turret is only 5 cm thick - a fraction of that of Western MBTs. This is in line with Samyang Comtech's claims (side armor stopping 30 mm AP and MPDS rounds only).

Nice to see a tank leak outside the WarThunder forums. 
 

Quite interesting about the side armor. Do you think Poland will pursue ERA to supplement it, or actually throw on more steel?

They will definetly add something but i think Koreans already have some era outside the cargo bins it is just missing a  bunch of angles 

In any case its a modern tank with modern optonics , hydropneumatic suspension likley gives it unrivaled shoot on the move capabilty and hard kill aps greatly increases survivabilty. But importnant part is that is significantly cheaper than Leopard 2

It is worth mentioning that last year ROKA told a member of the  parliament, that K2 is not protected against the Bulsae-5 ( Kornet copy), estimated to penetrate between 1,000 and 1,200 mm of steel. Given the armor thickness, this seems reasonable.

Polish sources also questioned the resistance of the K2's frontal armor against large-calibre APFSDS rounds; supposedly the K2's combat weight has to be raised above 60 tons to resist the expected 125 mm APFSDS rounds from the T-14 Armata.

The frontal cavities (containing thick ceramic composite armor to stop ATGMs and APFSDS) have a variable thickness ranging from ca. 650 to 850 mm. It is significantly thinner than the frontal armor of modern NATO MBTs such as the Challenger 2, M1A1+ Abrams and Leopard 2A5+.

,Of course there might be some magic high tech inside but .............

Some more info on the proposed specs for Polands K2PL, bumping tank to ~60 tons:

https://twitter.com/RyszardJonski/status/1719989600062427547

https://m.blog.naver.com/PostView.naver?blogId=rgm84d&logNo=223252805137&navType=by

The blog post goes into further detail, as well as discussion of what Koreans next gen tank may feature due to lessons from Ukraine.

A look at the potential K2EX 'export' version going forward:

https://twitter.com/mason_8718/status/1726909650040479922

Some of the specs we're likely to see in the K2EX

https://twitter.com/mason_8718/status/1716332303407030635

The above model still has side stowage baskets instead of turret side armor

Like the bare turret