Black Knight UGCV
While the Black Knight UGCV has not yet come out of the prototype stage, this semi-autonomous infantry fighter vehicle boasts promise. It is going to change ground combat for sure with its 30 mm autocannon and remote machine gun attachments. This is among the most powerful and biggest combat drones in the world. The plan is to use it as a wingman for the infantry.
The Mega M1 Riot Control Vehicle
This is a fully-loaded, fully-electronic, and fully-automatic beast known as the Mega M1 Riot Control Vehicle. It is over 17,500 pounds heavy and can control riots and small combat zones. The vehicle comes with climate control, weaponry, water hose, CCTVs, and reinforcement cargo space. As you can see, it was truly made with the idea of containing riots.