File:Metal Rear EX MSA idle.gif The Metal Rear EX is a playable unit in Metal Slug Attack, first appearing in the Extra Ops titled Wild Edge. A Metal Rear specially designed for difficult environments, it shares a similar moveset to the original, but reversed; it uses its vulcans as a short range attack while using its cannon over longer distances. When placed in a deck with the Ptolemaic Slug EX, they form the "Ver.expedition" team, reducing their AP costs by 10%.