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what to upgrade, when upgrading a spring


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11 replies to this topic

#1
mafiadragon

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Hi guys,
i need help i have a JG M4 Carbine and i want to upgrade it to about a 400 fps spring,
at the moment it crono'd at 300fps,
Can u guys tell me what spring would be best and what other parts i would need to upgrade.

thanks in advance

plz reply

craig
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#2
Nutster

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why do you want/need it to be 400 fps?

nutster

 

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#3
mafiadragon

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hi thanks for replying,
i would like it to be like that to give my gun a bit more "OMPH" :).

i had just put a Madbull 509mm barrel in it and a systema hop up,
and it does not really move far ( i kinda want it to be a sniper m4 :) )

craig
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#4
Devastator

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I doubt you'd be allowed into many sites with a full auto 400 fps M4 :lol:

#5
mafiadragon

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Yer :lol:
i asked the guy that own's or runs ( i think ) Elite Action Games Worthing and he said
"along as i have something physicaly stopping the gun from going to full auto im allowed to have up to 400fps on semi auto, but no higher"
:)

So does anyone know what i need to upgrade to be safe??
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#6
Wolf

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Yer :lol: i asked the guy that own's or runs ( i think ) Elite Action Games Worthing and he said "along as i have something physicaly stopping the gun from going to full auto im allowed to have up to 400fps on semi auto, but no higher" :) So does anyone know what i need to upgrade to be safe??

JG M4, eh? What model? Give me the specific manufacturer code (i.e. BI-3881 for Boyi guns) and I'll tell you what to do ;)
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#7
Wolf

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What the heck got messed up with the last post?  :blink:




Whatever... it's readable...
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#8
mafiadragon

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hi,
erm in not to sure if this is right but this is the only set of numbers i could find: NO.6604
just to say this gun was once 2 tone
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#9
Nutster

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take/find a picture of it, or even better a link of where you got it from, either of which should help to narrow down which model it is

nutster

 

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#10
mafiadragon

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this is the website i got it from http://www.actionhob...Tone_AIV4G.aspx

craig
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#11
Wolf

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this is the website i got it from http://www.actionhob...Tone_AIV4G.aspx

craig

Well... just get the spring ;)





I suppose your gun has 330 FPS because it's adjusted to the laws/rules in UK. Thankfully, I don't have such problems and had tested the same model shooting at 430 FPS (stock in Poland), also tried it on a M150 spring at time. And it lasted. 




Anyways, the model's the same, so it seems they just changed the spring - I doubt they'd put in another gearbox. And remember: JG guns are tough. Real tough. ###### tough. John Rambo-type tough ;)
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#12
mafiadragon

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ok thanks for ur time :)

craig
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