The fighter is used by an enemy of the Atlantis expedition in an alternate universe. When an alternate Daedalus transported to the universe where the race who uses these fighter are, they attacked the Daedalus, which had to fight these fighters off twice, the second time with the help of that universe's Atlantis expedition's F-302 fighter-interceptors. All of them from the battleship were destroyed. (SGA: "The Daedalus Variations")
While no officially licensed documents have been released detailing these fighters, a design card on Joseph Mallozzi's blog gave a few technical details. This article thus makes use of these details until they are overridden by a future source.