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Author Topic: Downgrade M4  (Read 2109 times)

Offline Sykinder

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Downgrade M4
« on: May 26, 2009, 10:19:24 PM »
How do I make my CA m4 shoot around 390 fps instead of it's current 420 I'm not sure how it's been upgraded because I bought it from someone who upgraded it
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Offline Polie

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Re: Downgrade M4
« Reply #1 on: May 26, 2009, 10:25:45 PM »
Quote from: "Sykinder"
How do I make my CA m4 shoot around 390 fps instead of it's current 420 I'm not sure how it's been upgraded because I bought it from someone who upgraded it
put a 100 spring in it
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"Dude! Your ride is sick as fuck!"

Offline Noises1xxxSniper

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Re: Downgrade M4
« Reply #2 on: May 26, 2009, 10:36:32 PM »
take it to the gearbox in tempe and have em look at it. its probably got at least a tight bore and hight spring in it. who knows. or take it apart urself and see what u find  ;)
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Offline Sykinder

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Re: Downgrade M4
« Reply #3 on: May 26, 2009, 11:14:32 PM »
Do I have to pay gearbox to open it up and look at it?
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Offline KOBO

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Re: Downgrade M4
« Reply #4 on: May 27, 2009, 10:24:01 AM »
Have to talk to Gearbox for their prices.

Most likely you will need to put a 110 spring in and you will be good to go.
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Offline stealthmaster14

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Re: Downgrade M4
« Reply #5 on: May 27, 2009, 09:02:56 PM »
Have them install a Guarder SP110.
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Offline Sykinder

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Re: Downgrade M4
« Reply #6 on: May 28, 2009, 02:40:56 PM »
Ok im too cheap to take it to gearbox so I opened it myself and I found a black motor I dont know what type it is since im new to opening up a airsoft gun I am about to take apart the gearbox as soon as i can get a metric size key 1.5 then how do I know what type of spring it is? I can put up pictures to
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Offline stealthmaster14

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Re: Downgrade M4
« Reply #7 on: May 28, 2009, 08:31:55 PM »
I suggest you pick up some shims and grease and reshim/regrease you gearbox.

Gearbox work/shim guide
http://www.858airsoft.com/upgrades/shim.html
http://pageproducer.arczip.com/daedalus03/workshop.html
http://www.airsoftretreat.com/forums/in ... ic=33907.0

Go to mechbox.com for a video on how to assemble the gearbox.  (ignore the shimming part, they do it wrong)

There's really no way to tell unless the spring is colored.  (some brands color their springs)  If you have another spring laying around and you know what kind it is, you could compare the tension.  That's all you can really do.
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Maddsurf

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Re: Downgrade M4
« Reply #8 on: June 02, 2009, 10:01:02 AM »
My 2 cents , but I dont screw with my gearbox unless I know what I am doing. Save the money and take it to GEarbox and have the pro's look at it trust me it will save money in the long run!
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Offline Sykinder

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Re: Downgrade M4
« Reply #9 on: June 03, 2009, 12:24:10 PM »
Yeah.... I took it apart but it wasn't working right when i put it back together so I took it to Gearbox and I should get it back today or tomorrow. :D   Oh and I took the motor out of it and out it in my mp5k and it messed up the fearing but the ROf increased
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Offline stealthmaster14

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Re: Downgrade M4
« Reply #10 on: June 04, 2009, 12:46:28 AM »
Quote from: "Maddsurf"
My 2 cents , but I dont screw with my gearbox unless I know what I am doing. Save the money and take it to GEarbox and have the pro's look at it trust me it will save money in the long run!

Actually it won't lol.  If you learn how to work on gearboxes, you don't have to pay people which saves you money lol.  

As long as one is somewhat mechanical, it's really not that hard.  You just have to do some research.
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Offline KOBO

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Re: Downgrade M4
« Reply #11 on: June 04, 2009, 06:24:46 PM »
Quote from: "stealthmaster14"
Quote from: "Maddsurf"
My 2 cents , but I dont screw with my gearbox unless I know what I am doing. Save the money and take it to GEarbox and have the pro's look at it trust me it will save money in the long run!

Actually it won't lol.  If you learn how to work on gearboxes, you don't have to pay people which saves you money lol.  

As long as one is somewhat mechanical, it's really not that hard.  You just have to do some research.

Think the point was if you don't know how to open up the box you can create a lot of problems.
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Offline stealthmaster14

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Re: Downgrade M4
« Reply #12 on: June 05, 2009, 04:58:52 PM »
That's why I said you research.  There are all kinds of guides and videos these days.
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Offline I Slap Fat Kids

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Re: Downgrade M4
« Reply #13 on: June 05, 2009, 06:02:35 PM »
I used http://www.mechbox.com to walk me through it my first few times.  Now the only work  I'll use a store for is electrical.
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Offline Sykinder

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Re: Downgrade M4
« Reply #14 on: June 10, 2009, 07:19:06 PM »
Well I took it to gearbox and got it back on Saturday and now it's shooting just how I like but now the battery wires getting really hot after like 5 shots then after the 5 shots it doesn't shoot and when the wires cool down it starts to go again then stops working. Any ideas what's wrong with it? I'm taking it to gearbox tomorrow
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