The Scorpion main battle tank is the UNSC's premier armored vehicle.  Sporting a 90 millimeter high velocity main cannon and a 7.62 millimeter coaxial machine gun firing armor piercing tracer rounds in addition to ceramic-titanium armor,  the Scorpion is equally dangerous to both Covenant infantry and vehicles.  Capable of withstanding between 1369 and 3080 kilojoules of energy before being destroyed, this is one formidable beast.