The X-302 Experimental Fighter was the prototype of the F-302. It resembled the X-301, but was built entirely from Earth-constructed components, using reverse-engineered knowledge of alien technology.

First seen in , the X-302 has four sets of engines: two traditional jet engines, two aerospike engines, one rocket motor, and a naqahdriah-based hyperspace window generator. Its conventional engines are assisted by an inertial dampening system that allows the craft to achieve orbit. The first prototype was used to save the Earth from Anubis's plot to detonate the Earth Stargate with an Ancient weapon system.• Although it was lost in the process and its hyperdrive turned out to be too unstable to use safely, the X-302 was considered a success and went into production as the F-302.

The X-301 Experimental Fighter is a fictional spacecraft in the science fiction television show, Stargate SG-1. The X-301 fighter visually resembles a cross between a Goa'uld Death Glider and a Nighthawk Stealth Fighter (F-117).

Only seen in the episode "Tangent", the X-301 was Earth's first attempt to reverse engineer Goa'uld technology. The initial design of the craft used some components directly from two Death Gliders which almost proved fatal to its passengers when a preprogrammed booby trap sent the craft into outer space during a test flight.• After Colonel O'Neill and Teal'c were rescued from the runaway craft during its first test flight, further work on the X-301 prototype was abandoned in favor of the X-302. While the fate of the X-301 craft is unknown, it was most likely left in space.