18. MAARS – Modular Advanced Armed Robotic System
Although not a regular sized tank, this little tracked monster can hold a 400 round M240B machine gun, a grenade launcher, and can even drag an injured soldier away from danger.
It rolls at 7 mph, up to 12 hours without stopping, so it’s a great robot to have around as a backup, plus it won’t complain at all! It has no AI, so this little guy won’t rise against humankind.