Where is the source for that? It wasn't on the link? TRG-300 has 90 km maximum range listed by Roketsan, if the range expansion follows the same pattern as UAV-230 and 122, it should have just about 200 km, not 500.
300mm rocket that we produced with help drom china since 2000 have 300 km ramge with 105 kg warhead , and 100km with 195 kg warhed .
So depends on variants and warhead weight .
This air lunched is bigger 370mm , 5 meter , 900kg and 500+ km accroding to rocketsan .
F16 can easy keep it under wing thats why i was steptical about Bora air lunched and i was right .
If we take eurofighter perhaps we can fire Kinzhal type missile from it .