There was an actual design for the 130 to have floats, but i cant remember if it made it to prototype stage or if it never left the drawing boards. It was the LC-130, not CL-130.
Its just like the C-47 with floats. Those are real and are common in Alaska (rather, thats where most of the float C-47/dc-3's are).
Looking at the OP I keep thinking, why do people say AH has horrible graphics?
Because it does compared to FSX with high settings, let alone if you have 3rd party upgrades.