HELP PLEASE M4 PROBLEM

johnjoe96

hey guys heres what happened was in lac the other day and broke my ics m4a1 in half(ninja moves an all that lol.) but i got a classic army thinkin the parts would be the same but they were not, now the classic army was not working at the time i took it apart, but when i put it all back together with ics barrel and motor in it worked but im getting no range and it seems to be firing out 3 bbs at a time on semi auto, has anyone had this problem and a fix for it because im pulling my hair out here and i think i done everything right putting it together.

thanks johnjoe.

Witcher

It's probably a hop up problem, strip the hop up assembly again and put it back together, that'll most likely fix it

Inari

ICS, because of their split gearbox design, use unique recievers. You'd need to get an ICS upper reciever to have to work as normal, if I remember correctly.

I assume it was the receiver that broke on the ICS M4? If you wanted, what you could do is swap out the CA internals for the ICS ones - but I'm not sure how cross compatible things like bushings/bearings are between 'em. Someone here will be able to tell you, just ain't me.

You can also fit your ICS innerbarrel + hop up mech into the CA M4, if not already done so. Should sort the hop problem, provided there wasn't a problem with the original barrel & hopup mech?

DeBurca

Blay is correct it sounds to me like your problem is connected to your hop-up unit
There is often small differences between hop-up unit from different makers and a mixture of hop-up unit and body from different makers may well be your problem
If you are using the Classic Army body then try the Classic Army hop-up unit in it,
There should be better fit between them and hence a better air seal

Insure that the barrel nut is tight as the hop-up unit is located in the front of the barrel and if it not all the way home the hop-up unit can move a wee bit forward

hairyman

The gears,bushings and motor are all cross compatible from the ICS to the CA(providing the bushings are the same diameter),,the gearbox shell and hopup chamber are not(ICS incorporates a barrel type hop up unit for their M4's,,,think G3 and your not far off)

As for the likes of Tappet plate,air nozzle and selector plate,,they all look the same but I cannot vouch for their cross compatibility with TM.

Trigger assembly and anti reversal also look the same but again I cannot vouch as the anti reversal latch is attached to the forward assist allowing for spring decompression.

As for spring guide,spring,piston,piston head and cylinder,,,these are all cross compatible with TM.

johnjoe96

thanks for all the answers guys but i stripped the hopup unit again and no joy,
im using all the original parts now that came with the classic army still same problem and the ics hopup wont fit in the upper reciever as it is a wheel the classic army is not, if you know what i mean, i guess ill have to buy a new hopup unit to make sure its not that, thanks for the replies lads

hairyman

Look up into the magwell while dry firing the AEG,,is the air nozzle moving back and forth?

Could be a problem with the tappet plate,,,,are you getting good spin up with the hop up fully on?

johnjoe96

yea the air nozzle is movin back and forth alright, im not getting any upspin with the hop up turned up all the way:(

hairyman

sounds to me like your missing your nub.

johnjoe96

whats a nub

johnjoe96

nevermind looked it up in google i think thats there alright cause its moving up and down when i twist the hopup not much though dont know if that matters

hairyman

Its a small rubber cylinder that links the hop up arm to the bucking,,,chances are if you have stripped the hop up then you probably lost it.

Its the small piece shaped like a spool in the pic below,
nub.jpg

hairyman

johnjoe96 wrote: »

nevermind looked it up in google i think thats there alright cause its moving up and down when i twist the hopup not much though dont know if that matters

Im still convinced its the nub,
15 lids will get you a new Guarder 50% bucking and nub,probably the best 15 euro you will ever spend in the airsoft game in my opinion.

johnjoe96

no i never took apart the hop up unit so i defo didnt loose it. there also seems to be a real nasty springing noise when i dry fire it, i was thinkin it could be the upper part of the gearbox where the spring is, could i take out the one from the classic army and replace it with the ics one, would there be problems if i did that or would it even fit?

Witcher

johnjoe96 wrote: »

no i never took apart the hop up unit so i defo didnt loose it. there also seems to be a real nasty springing noise when i dry fire it, i was thinkin it could be the upper part of the gearbox where the spring is, could i take out the one from the classic army and replace it with the ics one, would there be problems if i did that or would it even fit?

How did you swap the barrels without stripping the hop up?

The Classic Army gearbox doesn't split like the ICS one so you won't be able to switch them.

johnjoe96

i just turned the hop up all the way off took off the plastic piece that was holding the hop up to the barrel and just slid it out, with guarder still attached, did i do something wrong?

Witcher

johnjoe96 wrote: »

i just turned the hop up all the way off took off the plastic piece that was holding the hop up to the barrel and just slid it out, with guarder still attached, did i do something wrong?

So you have the ICS barrel with ICS hop rubber in the CA gun and vice versa?

Like Hairyman I'd still put it down as a fault in the hop up, have you removed the little arm pushing down on the hopup to see if it's functioning ok?

johnjoe96

no back to originals now, i will take it out tomorrow and let you know.

thanks;)

hairyman

The springy noise could be down to an over compressed spring,,the CA was probably left lying up for some time with the spring fully compressed so it now has room to rattle.

johnjoe96

thanks hairyman how would i fix that?

johnjoe96

ok feel like a bit of a nob head now but i just took the hopup apart and sure enough no hopup nub as hairyman said bout 10 posts ago lol. put in a new one and hopup is working fine now but that springing noise is still there if ya have a fix for that?

thanks johnjoe

hairyman

Its time to split the gearbox and change the spring,,your spring from the ICS will swap straight over,,,,if you have any doubt whatsoever then I suggest you have a tech do the work for you,,,as far as I know the ICS should also have a bearing metal spring guide(the CA will have a brass one with a nylon spacer/washer on it),,it would be no harm whatsoever to swap to the ICS spring guide as you will have the box open anyway.

If the ICS spring guide is nylon(which I doubt it is) then just stick with the stock CA one.

johnjoe96

sure if i dont try it ill never learn ha ha will have a go tomorrow its a bit late now. ill let you know how it goes. thanks hairyman

hairyman

Best of luck mate,,,have a look at mechbox.com.
Its a very handy site with regards to help with gearboxes,,,just remember yours a version 2(CA) and split version 2(ICS).

johnjoe96

sorted everything working fine now thanks guys