What is the best airsoft aeg rifle made by Jing Gong?

One of the best is certainly the G36C. It is very robustly built, has decent range and accuracy and it operates with a v.3 gearbox which works very smoothly. It seems to be reliable too, I've shot about 30.000 BB's so far with no problems whatsoever. I was so content with mine that I used it as an upgrade mule (precision barrel, high speed motor, 9,6v battery and red- dot) instead of getting a Marui and then upgrading. As a surprise present, the handguard accepts the 9,6v battery without any mods, a very rare thing for folding/retracting stock guns. One of the best, for sure.