TerraN_EmpirE
Tyrant King
Well when you licence something or share technology, there are generally changes made to the system to make it better suited to the wants and needs of the new builder. One need only look at the massive variations of the AK to see how this works. you look at the AK47 then the AKM of Russia then start jumping countries and see a massive number of variations of the system as each new builder tailors the system. you also have other makers who step in and take just the Ammo of the AK the 7.62x39mm and design there own system The Chinese type 56, Vz58M256 just builds upon the German L44 Technology, its however not a licence copy
Another case of this is the IMI 120 found in the Israel Merkava III and Merkava IV many say it's a L44 yet the Israelis never licenced the gun, All they needed was to design a gun system that could reliably and safely fire the ammunition.
The same can be said of the main gun for the newer Chinese MBT, They started with a understanding of the T72's 2A46 and the ammo of the system then designed a new gun around it for there newer tanks.