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My new KM4S is very inaccurate


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#1 batboyvaj

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Posted 24 July 2008 - 06:55 PM

I got my KM4S from Airsoftextreme last week.  I probably went through 2000 rounds this last weekend.  but the wierd thing is I was trying to set my hopup after that to allow the gun to break in and the bb's were flying everywhere after 75-100 feet.  I am using the G&G .2 bb's

My buddies JG mp5 shot straight and could hit a tree consistently from 100ft and I could barely hit it.  What's going on?  He was using the same bb's as I was.

#2 Doctor Kajita

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Posted 24 July 2008 - 07:29 PM

1) Clean the barrel thoroughly
2) Clean the hop-up bucking
3) Use .25 bb's
4) Adjust the hop-up

#3 batboyvaj

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Posted 24 July 2008 - 08:21 PM

View PostDoctorKajita, on Jul 24 2008, 07:29 PM, said:

1) Clean the barrel thoroughly
2) Clean the hop-up bucking
3) Use .25 bb's
4) Adjust the hop-up


I'll try cleaning the barrel and hopup again

#4 Doctor Kajita

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Posted 24 July 2008 - 10:58 PM

View Postbatboyvaj, on Jul 24 2008, 09:21 PM, said:

I'll try cleaning the barrel and hopup again

You should follow this: http://www.airsoftfo...h...c=97659&hl=

Scroll down a bit...see the post with all the pics.

#5 karMeister

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Posted 24 July 2008 - 11:56 PM

Too much lube in the hop/barrel?
Teflon from BBs forming in the barrel.

Clean the barrel. Best way is to take it out of the hop system while you do this.

#6 batboyvaj

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Posted 25 July 2008 - 05:56 AM

I just got the gun.  So i have not taken it apart of lubed it up yet.

#7 Guest_Inu One_*

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Posted 25 July 2008 - 06:20 AM

New KWA guns come with a crap load of silicone oil inside and out. This is suppose to act as a protection during shipping.  Your new gun will not shoot properly if you leave this stuff in.  Do what everyone suggests above but when taking apart the hop-up unit be careful not to loose the tiny little hop-up nub.  Most newbie owners loose this part without knowing it and complain how the gun shoot all over the place.

#8 Doctor Kajita

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Posted 25 July 2008 - 08:29 AM

Use good BB's too.

#9 DaTigah

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Posted 01 August 2008 - 10:51 AM

I say clean the barrel thoroughly and properly of course. I would also look around the internet on tips and procedures on how to take apart an M4 Aeg's Hop Up/Barrel Unit and how to clean it, because thats what I did.
Make sure you use new high quality bb's such as KSC perfect bb's.

If cleaning the barrel and the hop up bucking does not make your gun shoot as accurate as you want it to be, then you may have to starting saving up some money on a new tight bore and hop up bucking. There is a topic in this forum section that discusses what tightbore and bucking are compatible for KWA M4s.

#10 Stealthmaster14

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Posted 01 August 2008 - 11:38 AM

In addition to cleaning your gun, use KSC or AEs .25s (KSCs are better)  



In addition to cleaning your gun, use KSC or AEs .25s (KSCs are better)

#11 brooklyn468

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Posted 01 August 2008 - 04:33 PM

View PostDaTigah, on Aug 1 2008, 01:51 PM, said:

I say clean the barrel thoroughly and properly of course. I would also look around the internet on tips and procedures on how to take apart an M4 Aeg's Hop Up/Barrel Unit and how to clean it, because thats what I did.
Make sure you use new high quality bb's such as KSC perfect bb's.

If cleaning the barrel and the hop up bucking does not make your gun shoot as accurate as you want it to be, then you may have to starting saving up some money on a new tight bore and hop up bucking. There is a topic in this forum section that discusses what tightbore and bucking are compatible for KWA M4s.

Here is a good website that showed how to clean. It is a little down, but you'll get it.
http://www.airsoftfo...h...c=97659&hl=

And here is a hop up and barrel disassembly / reassambly link.
http://www.airsoftre...w...=118&cat=49

I got them on this this forum.  :lol:

#12 Skulldrag

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Posted 02 August 2008 - 07:51 PM

I've taken my M4S out twice and already the inner barrel is splintering.  It looks like grated cheese on the inside.  I've cleaned the inner barrel, the hop-up bucking and I've used KSC .25's.  I knew I was gonna upgrade the inner barrel so I'm not that upset.  But still, it is kind of annoying.

#13 karMeister

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Posted 03 August 2008 - 09:10 AM

View PostSkulldrag, on Aug 2 2008, 07:51 PM, said:

I've taken my M4S out twice and already the inner barrel is splintering.  It looks like grated cheese on the inside.  I've cleaned the inner barrel, the hop-up bucking and I've used KSC .25's.  I knew I was gonna upgrade the inner barrel so I'm not that upset.  But still, it is kind of annoying.


upgrading the inner barrel will make it more prone to debree but more accurate

Edited by karMeister, 03 August 2008 - 09:11 AM.


#14 vic_man4

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Posted 03 August 2008 - 12:16 PM

View PostkarMeister, on Aug 3 2008, 09:10 AM, said:

upgrading the inner barrel will make it more prone to debree but more accurate

Not unless you clean it religously :P




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