A Metal Gear prototype designed by Hal Emmerich on Shadow Moses Island. Although the original model was destroyed by Solid Snake, stolen data was spread across the world and many countries began designing and creating their own Metal Gear REX units. The original model was later repaired by Emmerich and used by Solid Snake to fight Liquid Ocelot, who was piloting a Metal Gear RAY unit. Although it defeated the newer Metal Gear due to Emmerich's secret "Street Fighter" program, REX was abandoned on Shadow Moses once again soon after.
Powers and Stats
Tier: 8-B. Possibly 7-C with warhead
Name: Metal Gear REX
Origin: Metal Gear
Height: 13.0 m
Length: 15.0 m
Weight: 505 metric tons
Armament: XGAU-8R Rotary Cannons, AGM-114P Anti-Tank Missiles, Tactical High Energy Laser, Magnetic Rail Gun.
Materials: Composite armor.
Attack Potency: City Block level. Possibly Town level with nuclear warhead
Speed: Likely Subsonic
Durability: City Block level (Virtually unharmed by Snake's weapons prior to the cockpit opening, designed to fix the weaknesses of previous Metal Gear units)
Range: Hundreds of meters. Intercontinental with warhead.
Weaknesses: Destruction of the radome forces the pilot to manually operate REX and open the cockpit.