Manufacturer lying
JRF,
It is right that the box simply says weight. It does not say weight ready to fly, but I have not seen any other kit that is only putting the weight of the hardware supplied.
The weight of the hardware supplied is of approximately 1800g. I have not installed the wheel pants that seemed really heavy(80 g) and have changed some hardware to reduce weight. I will finish it next week and will post the final weight.