The ICAO (International Civil Aviation Organization) Doc 8643 document contains designators for those aircraft types which are most commonly provided with air traffic service (ATS)
Sling 2 KIT - The Airplane Factory USA - The best-handling LSA
Aircraft Factory Sling 2 (1-двиг. поршн.) (SLG2) Aircraft (page 1) - FlightAware
Aircraft Factory Sling 2 (1-двиг. поршн.) (SLG2) Aircraft (page 1) - FlightAware
Одномоторный самолет - SLING 2 - The Airplane Factory, Inc. - четырехтактный двигатель / двухместный / очень легкий
Самолет для обучения - SLING - The Airplane Factory, Inc. - одномоторный / четырехтактный двигатель / двухместный
Sling 2 - Sling Aircraft
Aircraft Factory Sling 2 (1-двиг. поршн.) (SLG2) Aircraft (page 1) - FlightAware
Sling 2: The Soul Of A Fighter - Plane & Pilot Magazine
2020 AIRPLANE FACTORY SLING 2
Sling 2 KIT - The Airplane Factory USA - The best-handling LSA
Sling 2 KIT - The Airplane Factory USA - The best-handling LSA