I don't know how AT does model years, but I paid for this in 2020 and received it in 2021 from FWC in Bozeman. We've used it less than 10 nights, and it's been awesome, but we ended up selling the truck and I have no plans for a 5.5 foot bed truck in the future.
This was on a 2020 F-150 5.5'...