A mass-production model of Metal Gear developed in secret by the US Marine Corps.
RAY is an anti-Metal Gear weapon, created to counter Metal Gear variations.
The unmanned version was developed based on the prototype manned version.
It combines tele-existence and autonomous control systems to achieve fully unmanned capability.
RAY is equipped with missiles on its upper legs and back and dual machine guns on its arms. Its head is also outfitted with an internal high-pressure water cannon. However, in contrast to the manned model, the unmanned model lacks a tail.