IMP just for you:
http://www.military-today.com/tanks/t12_black_eagle.htm
Note it's designed for a 135mm - 152mm main gun though I can't remember how it's armed in the game for S. Korea. You can plainly see that's no 120mm gun pictured. Also a couple of articles have indicated that the Case Enclosed 40mm for the FRES and Warrior SV programs are here to stay. With the round being
3x more powerful then the current 30mm round why not? And I believe the round also is "self sharpening" in flight as well as I believe the 30mm round used by S. Korea is as well on their new K2 IFV, though I'm going by memory here (Might be Singapores TERREX Bushmaster II round.)
EJ: As I mentioned elsewhere, It took me a year to post again after following my primary five sources for that period of time to track and verify their info against each other and still other sources in my areas of interest. Bottom line I take my research seriously to be as accurate as possible and not waste each others time. Treat yours like a reporter trust the good ones and forget the rest. And thanks!
Pat