Rheinmetall KF51 Tank: German defence company Rheinmetall Monday unveiled its futuristic KF51 Panther main battle tank (MBT), which has a 130 mm main gun and is being described as better than Russia’s latest main battle tank Armata, at French defence exhibition Eurosatory. The KF51 Panther main battle tank is equipped with several futuristic features which includes protection against killer drones that have demonstrated their lethality against Russian armored vehicles in the war with Ukraine.