Replica DMR E6902M - Black [Golden Eagle]

Upon having this DMR for over a year and using it as my primary replica, I decided to rewrite my first review, but as I can not do that, I'm writing a second review.
Standard V2.5 gearbox does not fit without sanding inside of the lower receiver and drilling a new hole for the main back pin in the gearbox.
Lower receiver body is of very soft metal, fire selector is awful, stock wobbles more than on most of AR replicas, but the front part of the stock is somehow so tight so you can't fit electrical tape or velcro tape to the buffer tube to stop wobbling. Stock is large and can take almost any butterfly battery, yet is made in a dumb way so you'll have a problem with wires. Mine also disassembled on its own since the glue break which is holding plastic part which has an adapter for rubber back pad.
Pin on the dust cover doesn't do s**t and it's made of the cheapest plastic.
Magwell on the rear side has groowes so you can not fit a vecro tape when plastic on mags gets worn of. Of course my mags stopped feeding, I've managed to solve it by using maxx 2nd gen chamber (1st gen also had feeding problems on this replica, haven't tried 3rd gen) and putting few layers of duck tape from trigger guard to the magwell. Looks ugly, but it managed to push the magazine a bit to the front so it feed more or less properly.
Motor is useless so ht motor is a must. Screw threads are plastic in pistol grip, of course one of them worn off.
front rail is nice and heavy, but slightly larger than normal picatiny rail so naturally some grips and other attachments don't fit.
Outer barrel developed a wobble which is obviously a big no-no for any replica, especially DMR, I found some thick rubber pad, cut it so it fits inside the rail and use it as stabilizer.
As I mention before, selector switch is horrible. Gears for right selector are bad and give that cheap filing when using it, also barely noticeable click after some time so I replaced the spring inside selector switch and changed pin to a ball, I also deepened the holes on lower receiver for more noticeable click.
Gears are s**t, very loud with that wining sound, but you cant change them because mosfet works in combination with magnet on the gears. Also you can't change the mosfet because selector switch is propriatery and works specificaly with that mosfet. Not sure if different selector switch would work or fit. I managed to pull out the magnet somehow and put it in a spare sector gear which helped a bit with the sound.
Also, spring guide does not have a ball bearing.
Upon assembling the replica its very important the way in which you assemble it, otherwise nozzle won't be align with the hop up chamber since gearbox and body don't fit snugly as in some other replicas. Assemble it like this: Back pin, trigger pin, fire selectors, buffer tube and finaly pistol grip.
I drilled holes in gearbox for 2 more additional screws in pistol grip since with attachments my replica is 5.5 kg, and only 2 screws holding the pistol grip is too few for such a heavy replica.

Final verdict:
Does it work well? After many upgrades yes, I've had hits in game at 90 m with 2.3 j and 0.43 g bbs.
Would I buy it again? NO! That middle (recce) model I like the best in terms of looks, however considering the (very) low quality I would go with 417 assault E&C replica instead.

Jg or Golden Eagle replicas generally have a decent quality and some proprietary parts of body as well as internals. E6902M is no different. Gearbox is V2.5 by dimensions, however it has a proprietary cylinder head which in total length is 11 mm longer than standard cylinder heads so the cylinder is a standard V2. Airseal is decent, although for a more serious dmr role I definitely recommend nozzle with better airseal (preferably with an o ring). Piston does not have metal teeth so that would be also a needed upgrade. It's incredibly easy to lock it to semi-only: just sand a part of tappet plate which engages microswitch on the left (back) side of gearbox. Problem with my replica is factory shimming, it was to tight and gears have not moved freely as they should so I recommend paying few euros extra for taiwangun service of relubricating and reshimming if you are not comfortable doing it yourself. Also V2.5 is easy to install instead of factory gearbox. Gearbox does have a quick spring change, however lower reciever construction makes it imposible with out removing gearbox from the replica. Motor does not have a nedymium magnets.
Does not have a working bolt catch and as usual with almost all AR-based replicas, stock is a little wobbly.
Body quality is superb.
With normal V2.5 gearbox and decent shimming it would easily pass for 5/5 stars.