The FM301 was designed to comply with the Fédération Aéronautique Internationale microlight category, including the category's maximum gross weight of 4500NaN0. It features a cable-braced hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit with a cockpit fairing, tricycle landing gear and a single engine in pusher configuration.
The aircraft is made with a monocoque fibreglass carriage, with its double surface wing covered in Dacron sailcloth. Its 9.51NaN1 span Quasar wing is supported by a single tube-type kingpost and uses an "A" frame weight-shift control bar. The powerplant is a twin cylinder, air-cooled, four-stroke, dual-ignition 600NaN0 HKS 700E engine, with the two-stroke 640NaN0 Rotax 582 and the four cylinder, air and liquid-cooled, four-stroke, dual-ignition 800NaN0 Rotax 912UL or 1000NaN0 Rotax 912ULS engines optional. With the HKS powerplant the aircraft has an empty weight of 1750NaN0 and a gross weight of 4500NaN0, giving a useful load of 2750NaN0. With full fuel of the payload is 2450NaN0.
The unusual fibreglass structural construction allows internal fuel tanks and also permits a large unobstructed baggage area. The FM301 also has a unique wing mast system that allows the wing to be assembled and mounted on the carriage single-handedly.