According to Military.com, Textron Systems, via its subsidiary Howe & Howe, is set to deliver two versions of a new robotic tank to the US Army. 

Textron will deliver up to four 10-ton Ripsaw M5 Robotic Combat Vehicle prototypes by the end of this year; each of the tanks will be outfitted with a diesel-hybrid powertrain. An all-electric version of the M5 will be delivered in the first half of 2021 for pilot testing. 

Ripsaw M5

Textron Systems' Ripsaw M5 unmanned vehicle at the 2019 Association of the United States Army's annual meeting. h/t Textron 

"The RIPSAW® M5 is mission-ready," Textron tweeted earlier this month.