As a huge fan of Judas Priest in the 1980's, I recognized the basis for this tattoo immediately: the cover art for the 1984 album Defenders of the Faith.
Gregory has four tattoos and is a fan of Japanese-style art. This album and its predecessor, Screaming for Vengeance, boasted cover art that had a distinct Japanese influence.
He worked with the artist, C-Jay at Rising Dragon in Manhattan, to modify the design slightly, removing the tank treads and other militaristic elements from the original design.
Thanks to Gregory for sharing his amazing tattoo with us here on Tattoosday!