Waylander has hit the mark with his comment on the armor. currently what most people think or worry about is this. Unfortunately we dont know what level of know how Turkey has on armor tech. Hence the need for foreign tech assistance.
I am quite sure the walking parts of the tanks will be supplied from well known companies (like MTU,Renk etc) or licence built in Turkey.
Gun can be a MKEK design since they have a good background with 105mm and now have 120/L52 tech. MKEK has the know how of 120/L52. So the problem is will the TMBT have the same gun or a L55. Ammo will be the next step after gun is decided.
FCS,opticals, electronics required for network centric warfare and other various electronical stuff will be designed & developed by Aselsan. Infact they are already working on prototypes.
Passive protection systems will probably be bought off the shelf.
Active protection systems.. currently no details.
Armor is the main problem. There are researches in Turkey for installing a boron-carbur armor on helicopters and possibly to IFVs against medium to higher caliber cannon fire but laminated high tech tank armor is another story. Its the most difficult part for us and its the most cloudy one. Some say IMI has transferred some knowledge on armor tech and some say this is not true. I believe the second part for now. So foreign asistence will be required here. But i am not sure if a foreign company will want to share their top secret armor tech. I am also not sure if Turkey will really want to let foreigners know what kind of materials are used in the armor and what its weakness might be. So here Korea with their new MTB K-2 might be a better tech supplier than Germany or France.
An important note Ukraine is out of the question. For the request for technical support & assistance (RfTSA)
* Agency for Defence Development [S. Korea],
* GIAT Industries [France],
* Krauss-Maffei Wegmann GmbH & Co. KG [Germany], and
* Rheinmetall LandSysteme GmbH [Germany].
have replied and one of them will be selected by SSM (secreteriat for defence industry) to work with the Turkish constructor company..
Not that other than Ukraine, USA is not on the list with GDLS maker of M1
regards