We already know the AIM-120D shares the same motor as the AIM-120C-7, the AIM-120D-3(F3R) is the model that has the larger motor.
Also, these sites have regularly posted misinformation on the weight, range, parts of the missile so I wouldn’t be surprised if they continue to do so.
aim-260 is quite impressive considering it’s still essentially in the same form factor as aim-120. really impressed at how much range they’ve managed to squeeze out of it
here is the link to the study itself https://www.aeroweaponry.avic.com/CN/10.12132/ISSN.1673-5048.2025.0057
If this does hold up, it’s looking like the chinese will have the very best long range missile, with the us close behind, then the russians