What is the name of Cobra's primary fighter jet?

Cobra's primary fighter aircraft is the Rattler.

The Cobra Rattler is a VTOL attack aircraft and one of Cobra's best-known combat planes in G.I. Joe: A Real American Hero. Although it is often described as a fighter or jet in quiz material, its design and role are closer to a ground-attack aircraft, modeled in part on the Fairchild Republic A-10 Thunderbolt II.

The Rattler first appeared in the toyline in 1984 and was packaged with the Cobra pilot Wild Weasel. It served as Cobra's answer to the G.I. Joe Skystriker, which had entered the line the previous year. Its distinctive forward-swept wings and blue camouflage made it instantly recognizable.

The distractors belong to other aircraft or factions: Firebat and Night Raven are Cobra vehicles, while Skystriker is a G.I. Joe aircraft. The precise label “primary fighter jet” is simplified, but Rattler is the canonical answer intended by this question.