IM no Expert but, The Japanese version of the Cybertron series - Galaxy Force in Jap has Wingsaber with a chromed up chest plate much like the one in your link.

If this is a Korean figure they usually are official releases of the toy in Korean Packaging. Much like how it was with the Beast wars figures released by Sonokong in Korea under license from Hasbro... closest source of course would be Taktom instead of Hasbro hence Galaxy force version instead of the painted chest only that is Hasbro's release. They release TF figures there in their own packaging bearing Korean characters writings instead of English or Jap writings. That's nationalism for yah, but these are officially sanctioned I believe by Hasbro/Taktom

I believe the figure is Legit.