METAL DRAGON? We've mutated into MilSim MONSTER!! lols 
we have become ONE! Muwahahaha.
Honestly, I guess I need to buy another JG, one of the "newest" versions, and break it apart and see how they are being made currently.
None of my JGs are newer than V2 gearboxes... of such I am grateful, as I actually like v2 over V3 gearboxes. Except one minor thing, ... but even the V3 seem to have that stupid fire mode selection issue after a while, despite the "re-design".
But, I can say... JGs aren't any "better" or "worse" than their competitive level other "brands".
They have their own quirks, and slight differences... set apart from any other "sport line" or "mid grade" AEGs.
But , especially for starting out... it's a decent brand for sure.
They USUALLY perform very well , out of the box...
Even though, I myself have moved beyond desiring to use and buy JG exclusively ... I can say my Jgs have been very good to me, and are phenomenal for the prices they run at.
It is possible, to spend 3 times as much on an AEG, and not even get the base performance you can get out of a JG out of the box.