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Airsoft Forum & MILSIM Forums > Airsoft Gun Discussion > Gun Building, Modifications & Repairs > JG M4 S System Upgrades *Many pictures


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Old 09-28-2011, 12:10 AM   #1
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Default JG M4 S System Upgrades *Many pictures

I've got a JG M4 S System with a pre upgraded gearbox, and was wondering what some possible upgrades I can do on it are.... I've got a relatively small budget and want to make the most out of any internal upgrades. Looking for accuracy and maybe a higher ROF if possible as the fps is already too high for me to play at some local fields. My shots consitently have a slight curve to the right. Also the battery is meant to go in the handguard but it only fits a mini 8.4. To fix this I got a false PEQ box but it's extremley annoying and i was wondering if i can get a new stock and wire the battery back there or get a different attachment to hold it on the front. There's some grease (I think that's what it is) on the GB should I wipe it down and then regrease with White Lithium Grease? The silver thin piece of metal on the outside of my GB has to be held down when i close my gun up, is this a problem? And lastly what does that little black button that is attached to the lower reciever do?I'm a newb at internals so I'm sorry if some of my questions seem a bit dumb.

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JG M4 S-System Airsoft Gun ( Enhanced Version ) by: JG - Airsoft GI -

Pics (couple more in next post):




img_4904.jpg   img_4916.jpg   img_4906.jpg   img_4920.jpg   img_4933.jpg  

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Old 09-28-2011, 12:12 AM   #2
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Just realized that's all of the pics I had if you guys need me to take more of something specific just say so.




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Old 09-28-2011, 05:41 AM   #3
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What is your exact budget? That will effect what upgrades are recommended.

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Old 09-28-2011, 06:02 AM   #4
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Here's what I think, and if Age is helping you, feel free to ignore me entirely....lol

With the JG having a m120. I would actually short stroke the piston a couple of teeth. This will lower your fps a hair, and increase your rof some as well.
A lipo will absolutely fit. Measure the existing battery, go on hobbyking.com and pick you out a 11.1v that is a equable size.
I would do your best to lighten the piston as much as possible.
A metal spring guide if needed
Steel bushings of needed (you could technically get bearings and it will increase the ROF, but i don't know how long that would last...)
I would keep the stock barrel until you figure out you don't like it before changing it "just because".
Look into the R-hop. If you are too intimidated by that, then we can talk alternatives.
Reshim (this is probably the most important thing.)
Ultra high torque neo motor
MOSFET
Deans

I would like to know your budget as well...

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Old 09-28-2011, 10:48 AM   #5
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My budget is about $100.
My enitre GB is metal Tackett so I'm not sure if replacing my metal spring guide with a nicer quality one is a practical upgrade, although I don't really know much about the internals so maybe it does...
Is short stroking and adjusting AoE hard? I'm slightly accident prone and don't want to shave too much off. Is there a big difference in a high torque motor and an ultra high torque neo?
And are your saying a 11.1v LiPo will fit in a 8.4 mini battery area or the external PEQ?

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Old 09-30-2011, 01:12 AM   #6
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*bump (lalaalalalalalalalala 20 character rule)

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Old 09-30-2011, 01:22 AM   #7
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$100 is a good budget. Grab some of these :

SHS 13:1 gears $<20
SHS piston $<10
SHS 7mm bushings $<5
SHS shims $<3
SHS high speed motor $<30
Guarder sp90 $<15
Systema bucking $<8
Deans connectors $<5
Washer for AoE $<1

AoE is placing a washer on your cylinder head. Very easy. Swiss cheesing is drilling holes in your piston to lighten it. Make sure you shim it like mentioned in the guide above.

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Old 09-30-2011, 01:40 AM   #8
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Quote:
Originally Posted by RCV View Post
$100 is a good budget.

AoE is placing a washer on your cylinder head. Very easy. Swiss cheesing is drilling holes in your piston to lighten it. Make sure you shim it like mentioned in the guide above.
Oh my bad the sticky guide is slightly misleading. They short stroked the 2nd piston tooth I guess as well as adjusted the AoE. Thanks for your input. Surprised anyone would respond with the giveaway up
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Old 09-30-2011, 02:00 AM   #9
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AOE needs adjusting. keep it stock and upgrade whatever breaks or wears down. test for airleaks and upgrade those parts.
do you want a higher rate of fire? i don't recommend an 11.1v, a 7.4v 20c or 25c 1800 mAH fits in there fine. 11.1v will require trimming the inside handguard to fit without damaging it.

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Old 09-30-2011, 02:09 AM   #10
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Quote:
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AOE needs adjusting. keep it stock and upgrade whatever breaks or wears down.
Why keep it stock? Because it's a tank? Haha I'm curious. Thanks for the info on the lipo alex



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