The vehicle was announced in 2016[4] and was developed by the Arey Engineering Group [uk],[1] an engineering group belonging to the Azov Battalion.
Sergei Stepanov, the chief designer for Arey, claimed that the tank would have a "conceptually new system of fire control and a high level of personnel protection," along with "many features include high maneuverability, 360-degree vision, and a high-bandwidth counteraction analytics system.
"[1] The vehicle would be based on the T-64[2] and hulls of T-64 and T-72, inherited by the thousands from the Soviet Union, would be reused in the production of the tanks.
[1] The Azov Battalion estimated that up to 20 tanks could be upgraded every month.
[2] The three crew members would be seated in an armored capsule at the front of the hull, where they could remotely-control the cannon, the automatic loader and the machine guns[1] T-Rex would weigh 39 tons and be equipped with a 125mm main gun with "high-power projetiles".