>>/47977/
> How the turret moves?

They've said that it had problems with angles when turret looks to sides and back, but in front it was ok.

I can recommend few articles about these projects, they are in Russian but must be translatable. Everything is from 30 years ago though.

Late USSR:
http://btvt.info/2futureprojects/490_21vek.htm
http://btvt.info/2futureprojects/490a.htm
http://btvt.info/2futureprojects/490.htm
http://btvt.info/2futureprojects/t-95.htm

About USA:
http://btvt.info/2futureprojects/no_turret.htm
http://btvt.info/2futureprojects/fmbt/fmbt.htm