While looking up information on the M1A2 TUSK MBT I came across some images of the prototype M1A3 Abrams displayed both on a flatcar and in an open field. It appears to follow the conventional turreted, large-caliber gun current design of the M1A2 Abrams but with a more massive, squarish turret. The only info on gun size was speculative in that a 120mm and 140mm tank gun are under consideration.
Hope to see this in a future SPMBT upgrade.
By the way. Thank you to all involved in the recent v7 patch and the ongoing improvement of an already outstanding game. You folks are great!