Future Energy Hong Kong have made a full-auto system for the KJ Works KC-02 gas blowback airsoft carbine that would make this carbine even more skirmishable. Not yet available at their website, we wonder if this is a kit that you will need to install on your KC-02 or it's a full custom version designed for CQB games. Video below shows it being tested.

UPDATE FROM FUTURE ENERGY: "The CQB Kit includes CQB short outer barrel and some parts of the 'Full Auto System.'"