Stock performance...

Hop up needed some breaking-in period reason why the first 10 bb's flew like nuts.

By the 20th bb flight is getting more stable. Finally at full auto the bb's are getting more

stable going in one direction. Yet the hop up needs some checking especially the adjuster.

The usual acm aeg fine tuning routine is a must here. But it's playable/field able  enough.

The feed is flawless at about 13 rps rof using the stock batt at full charge.

Check out this vid,,,

http://www.youtube.com/watch?v=vzFphunzD28

It's a windy day so give some of those bb's going to the left a break...lol!

Stock fps at least mine ranges at 381-385. I'm sure they have put a type 0 cylinder now.

Inner Barrel length is 510 mm printed on the box, that's the true m16 length that matches a type 0 cylinder air volume. Seems it's true coz you can see the inner barrel just a little down the flash-hider.

Very nice! tuwa na ba kayo mga adiks?! hehe... (you happy now airsoft addicts?)

Metal Parts...

Just check out the pics which part is metal.

The receiver...

Yeah it's plastic but it's well made at least the way I see it.

It has greyer color which gives it a highlighted look.

It even feels like a Marui plastic receiver. Hopefully those so called "ears" are strong enough in this. The selectors are engraved unlike on most metal receivers their just printed down. The charging handle isn’t bad sounding when c0cked.

Forward assist is fully functional this time....yehey!!!

Metal Open Sights seems fully adjustable the front and the rear parts with elevation adjustment on the rear sight as if most of us are actually using those but

it's a very nice feature making the gun more realistic

Handling...

The rifle at first touch feels so solid and very light without the batteries of course.

Some m16 marui's I've held tends to have a loose. Jg's m16 as of now feels solid enough just a slight wobble on the fore grip. If you do force it though heck even the real thing has a slight wobble there. I’m used to longer rifles tnx to the dragunov (46 inches long) and the m14 (44 inches) so this one which is only about

100 cm long (about 39+ inches) will be much easier to maneuver in combat.

The fixed stock is a blessing. Not only for better aiming but it hides

the best large classic batts balancing the rifle for good. The fixed stock also helps

limbs that carry the rifles have a little break by simply squeezing it just underneath the

arm pit hehe. I always see soldiers doing this btw.

The metal mag...

Oh...this by far is the best acm m4 metal mag I've ever used.

The winder is little bit more expose which is good imo for faster and better winding feel to it. The spring coils seems strong enough just like cyma mags. The winding key is a nice added feature for those who want to do really fast full winds while in the neutral zone. Although I prefer using an allen wrench or my modified drum key for winding the mags really fast. With a dozen of these mags on your vest it will surely be a joy blasting away in the field hehe.

Upgradeability...

Jing Gong bells 2x ooops I mean JG is known for cloning TM aeg's up to almost some perfection so I'm sure JG's m4/m16 are really easy to upgrade, tweak and maintain. The external quality alone is simply convincing enough.We'll see...

Ok here are the internal pics but first plz read this....

Woah! It's true. Guys in china over greased the gearbox too much. Even the hop had some grease reason why I think sometimes I loose the hop effect on some testfires. Yet it's stock hop rubber was a perfect fit to the hop up assembly. No teflon needed. Seems they ran out of silicone wires they just used speaker wires on the extension wiring, a must change.The stock piston head was ported but the holes we're too small so I simply enlarged them. Stock nozzle and cylinder hear are also quite ok. Nozzle fits a little tight which is good for better compression. Unfortunately darn cylinder is still a freakin type 2!