AEG review - Jing Gong M16A4

[Splashx]

I won't be completing my review today as I only received it july 2nd. Stay tuned for further updates.



PACKAGE CONTAINS (asian version)

• Jing gong M16A4 WITHOUT orange flash hider;
• 8.4v 1500mah NiCD battery, large connector;
• Orange plastic muzzle comdon;
• 300bbs metal high-cap mag;
• Cleaning/Unjamming rod;
• M16 manual (engrish /chinese);
• Hop-up and motor plate adjustment tools;
• 200 crappy 0.20g BBs;
• Euro charger

In stock form, it's shooting 349-350fps steady in 10 shots, with 0.25g, so converted to joules and joules to 0.20g it's 390-391fps! Even if it's stated 330-340fps with 0.20g on the box...

BATTERY AND PERFORMANCE
The 8.4v 1500mah NiCD is punching pretty well. Nice ROF (calculated at 720-780rpm with a microphone and a WaveEditor) and fast trigger response. The difference between this one and one 8.4v 3500mah NiMH with deans is noticeable. I got 840rpm. It also tells me it has a pretty good motor to pull EASILY a 390fps spring. (we will see it in few days).

WIND-UP SOUND
Now, let's talk about motor and mechbox wind-up sound. The motor is as quiet as a fine adjusted Marui. But the thing I hear the most is the piston head punching on the cylinder head. Punching is a right word. I also feel it in the stock. It woulb be a good idea to insulate the beginning of the stock. This sound is pretty as lound as the Sentinel's M16a2 review. Putting a silent head set is recommended as you could break-up your mechbox....It's shooting 390fps with a marui clone piston head!!!!

WEIGHT
It's a little less heavy as I thought. Compared to my (was mine) metal G3-sg1, maybe 1 pound less. Will be better with a metal body. Weight is pretty balanced front and rear. Stated 3350g, so 3.35kg, 7.4 pounds.

RANGE AND GROUPING
The range is about 1-2 metres more a m4a1 with a tightbore. The grouping is pretty bad as we can get some bbs falling 50% off the regular stance and some are way to high. A bucket change is needed and a 509mm tightbore is a must.

HAND FEELINGS
Not creaking at all. maybe a small play on the handguard (1/16 or less). The side rail covers are a little loosen but the bottom and top covers are fixed.??? Plastic body is pretty strong and nice finish on it. Plastic stock is looking cheap, pretty light weight but solid. The front rails are made with extra light-weight alu. As light as I thought at first sight they were plastic. Black coating on rails is not bad.

The cocking rack bolt is well made. Metal and stiff. Bolt door open as we pull the rack. Rear sight adjustment is also pretty well made, all metal and accurate (height and sides). Plastic carry handle but metal rails on the top of the body (A4 version).




HIGH-CAP MAG AND FEEDING
Metal made, light-weight. Good finish. Feeds pretty fine but 4 bbs remains in hop-up when mag is empty. Lows or Mids would reduce remaining bbs in hop-up from 4-5 to 2-3. (Will check metal King Arms lows fitting when I'll receive them). Mag insert easily in mag well and no play at all.

DEEP IN THE MECHBOX
To be continued...

DROP-IN MODIFICATIONS
As well as other Tokyo Marui clones, there's plenty of parts available, from cheapo to more valuable of this JG M16A4. What I would recommend (if you want to upgrade it, it's not necessary), is :

• droping a 509mm lenght thightbore;
• better hop-up bucket;
• improved piston with head and cylinder head according with quality cylinder;
• bearing spring guide;
• nozzle;
• For metal bushings, I'll check the mechbox and take pictures.

For the M16 cylinder kit and spring guide, I would recommend the Guarder brand, Deep Fire or Guarder for the 509mm thightbore (6.04mm dia and smaller, use quality BBs). Changing the gears is not necessary in my opinion, but you may keep a spare gear set near you if you don't take care your Jing Gong. This may change or not in the long term test.

If you don't have some more cash or don't want to put more money on it, I would recommend to downgrade the spring to 350fps and bellow. It's my opinion, I prefer to stay safe and more chances it lasts longer.

The thing is IF you pu all these together, the m16a4 will probably (as I'll receive some parts later this week) overpass the 400fps field limits. So you'll probably needs to downgrade the spring. From the end of the week, I'll test a prometheus ms110sp spring that would be your best bet in my opinion.

This review will be updated regularly as I use it, so stay tuned!

[Skladfin]

nice, is there any play in the foregrip?

And the previous version of the same gun had a wrong cylinder installed, you might want to check that.

[Splashx]

Originally Posted by Skladfin

nice, is there any play in the foregrip?

And the previous version of the same gun had a wrong cylinder installed, you might want to check that.

Yup, there's a small play in the foregrip (about 1/16) but may be improved.
I'll check for the cylinder, thanks.

[Splashx]

now small update, last game at haboob at montreal, it chronos 425fps with 0.2g stock!!! weird thing as it gave me 390fps 2 weeks before. And yes, even with a 425fps, it has the cylinder of an m4a1 (shorter barrel)

[Vince]

425? SHit mine gives me 350 constant

[Splashx]

Originally Posted by Pvt Vince

425? SHit mine gives me 350 constant

Yup, you may ask at the chrono officer at Op haboob that tought it was a PTW with m130 cylinder.

[Muffin]

I had one of these as well, the most ammusing thing I found was that the rail system is actually 2 M4 models modded and bolted together leaving an ugly crease.
Maybe it was only mine or is yours the same?

[Splashx]

Originally Posted by Muffin

I had one of these as well, the most ammusing thing I found was that the rail system is actually 2 M4 models modded and bolted together leaving an ugly crease.
Maybe it was only mine or is yours the same?

Yup, just found it's the same thing here. But not to much visible as the rail covers are on. And yes it's a little uggly

[Sentinel]

Originally Posted by Pvt Vince

425? SHit mine gives me 350 constant

The difference is because Splashx have the 2008 version wich have stronger spring (maybe other differences but I don't know), We both have the version prior so we are at 350 fps.