US Army woking on Abrams MBT sucessor project

US Army Abrams MBT's sucessor will be optional manned tank (OMT):

In early October, six Soldiers from Ft. Benning reviewed and provided critical design feedback on four future Optionally Manned Tank (OMT) concepts to refine, to downselect, and to improve the concepts in FY21. This was the third Soldier Touch Point under GVSC's Virtual Prototyping program.

Today’s US Soldiers are helping to inform early development and engineering decisions on the Army’s next tank through Virtual Prototyping.

Six soldiers conducting a virtual experiment to provide input for the Optionally Manned Tank (OMT), a project in the early stages of development by the Army. 

Ultimately, the OMT program seeks to explore options for a possible future main battle tank through virtual prototyping. Virtual prototyping is a process the Army is using to create and assess multiple OMT vehicle concepts. The concepts are informed by Soldier Touch Points and enhanced modeling and simulation (M&S). The input from Soldiers helps to drive requirements and science and technology investment. 

With the completion of the Virtual Experiment, team will now review the collected data to refine and update the OMT virtual prototypes based on the Soldiers’ feedback.

Additional experiments are scheduled to occur in FY21/22. Upcoming experiments will provide further insights into the development of the OMT based upon refined learning objectives and lessons learned from previous experiments. The experiments will also be conducted against a simulated near-peer adversary in an operational environment to better understand and develop future vehicle requirements.

The Army plans to make a decision in 2023 on possible options to develop a new tank.