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KWA M4 bolt cover, misfeeding, and gun firing when on safe


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#1 eleeschalow

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Posted 03 January 2009 - 07:23 PM

So I received my KWA from a friend who had put less then 1000 rounds through it(didnt like it, wanted a different type of gun). I had only shot 2 magazines till after attempting to adjust the hop up, I noticed that after I had let the charging handle go, the mock bolt had gotten caught against the side of the hop up chamber. I decided I would open up the two receivers to see what it was caught on, and as soon as the upper opened up, the bolt corrected itself. After closing and returning the screws to their original places, I decided to finish off my third magazine(I was getting a feel for my new rifle{range,rof,etc}). Then I noticed that the magazine that had once fed, was beginning to misfeed. I removed the magazine out of the gun and shot it once, and the bb that was caught or so it seemed flew out of the barrel. Thinking that the occurrence was a fluke I loaded up the rifle again. Same issue. I went upstairs took out the hop up and checked to see if there was anything jammed, nope. Then when i went to plug the battery back into the gun to give it another go, it started firing full auto while being on SAFE. I have not touched the gun since I realized that this has become an issue I cannot fix. This gun has seen very limited use and is outside of its 45 day warranty although it was mostly hung on my friends wall. If the KWA Staff or anyone that has encountered the same issue give me a headsup on what the issue is, and if they could give me an estimate on fixing it that would be great. Thank you.


*EDIT* The full auto on safe was remedy after freeing up a pinched wire. The misfeeding is still an issue and i need to figure out how to install the mock bolt. Thanks

Edited by eleeschalow, 03 January 2009 - 07:30 PM.


#2 vic_man4

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Posted 03 January 2009 - 07:54 PM

View Posteleeschalow, on Jan 3 2009, 08:23 PM, said:

So I received my KWA from a friend who had put less then 1000 rounds through it(didnt like it, wanted a different type of gun). I had only shot 2 magazines till after attempting to adjust the hop up, I noticed that after I had let the charging handle go, the mock bolt had gotten caught against the side of the hop up chamber. I decided I would open up the two receivers to see what it was caught on, and as soon as the upper opened up, the bolt corrected itself. After closing and returning the screws to their original places, I decided to finish off my third magazine(I was getting a feel for my new rifle{range,rof,etc}). Then I noticed that the magazine that had once fed, was beginning to misfeed. I removed the magazine out of the gun and shot it once, and the bb that was caught or so it seemed flew out of the barrel. Thinking that the occurrence was a fluke I loaded up the rifle again. Same issue. I went upstairs took out the hop up and checked to see if there was anything jammed, nope. Then when i went to plug the battery back into the gun to give it another go, it started firing full auto while being on SAFE. I have not touched the gun since I realized that this has become an issue I cannot fix. This gun has seen very limited use and is outside of its 45 day warranty although it was mostly hung on my friends wall. If the KWA Staff or anyone that has encountered the same issue give me a headsup on what the issue is, and if they could give me an estimate on fixing it that would be great. Thank you.


*EDIT* The full auto on safe was remedy after freeing up a pinched wire. The misfeeding is still an issue and i need to figure out how to install the mock bolt. Thanks

What magazines are you using? That could be a issue.
Also, have you fully disassembled the hopup unit yet to see if it was a hopup bucking issue?
Misfeeds could also be caused by tappet plate malufunction, but thats getting in depth into the gearbox which is something that you might not want to get into right away at this time since there are a lot more to nock off the list of possibilities.

Try using someone elses mags or lubing yours up to see if they work, if still no luck, examine your hopup unit carefully, still no luck, split your two recievers in half and shoot your gun a few times to see if the airnozzle is properly moving all the way back.

Worse comes to worse, call into KWA (1.626.581.1777) and ask to see what they can do.

#3 eleeschalow

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Posted 04 January 2009 - 06:07 AM

Thanks. The magazine works fine im using the hicap that came with the gun. I know this for a fact because i inserted the magazine while the upper was removed to check if the bbs were being fed and they spewed everywhere telling me they were feeding. I have not looked at my bucking and will do so now. I heard that KWA's tappet plates are faulty? Hopefully the hop up is the issue here.

#4 eleeschalow

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Posted 04 January 2009 - 07:34 AM

Well i just checked out the hop up, and although the barrel spacer was under the bucking itself after being removed it still wouldnt feed at all. Maybe it is infact the tappet plate thats the issue. Guess ill be calling KWA.

#5 karMeister

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Posted 04 January 2009 - 10:01 AM

View Posteleeschalow, on Jan 4 2009, 06:07 AM, said:

Thanks. The magazine works fine im using the hicap that came with the gun. I know this for a fact because i inserted the magazine while the upper was removed to check if the bbs were being fed and they spewed everywhere telling me they were feeding. I have not looked at my bucking and will do so now. I heard that KWA's tappet plates are faulty? Hopefully the hop up is the issue here.

This is actually the first time ive read that somone heard that "KWA tappet plates are faulty".  
Tappet plate issues = ICS. BTW You can also check the spring on the hop uinit if its there.

#6 eleeschalow

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Posted 04 January 2009 - 11:45 AM

Yea first time as well. Ive owned the KWA G36 and no problem there. I came across it when i was searching up misfeeding for KWA M4s. Yea the sping is not there, but ive shot the gun before without it and its shot perfectly. I may try to find a replacement and see if that works. Ill keep you guys posted. Also i have a mock bolt from some other gun. Its metal unlike KWA's aluminum one? Its almost identical, will it work?

#7 karMeister

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Posted 04 January 2009 - 11:54 AM

View Posteleeschalow, on Jan 4 2009, 11:45 AM, said:

Yea first time as well. Ive owned the KWA G36 and no problem there. I came across it when i was searching up misfeeding for KWA M4s. Yea the sping is not there, but ive shot the gun before without it and its shot perfectly. I may try to find a replacement and see if that works. Ill keep you guys posted. Also i have a mock bolt from some other gun. Its metal unlike KWA's aluminum one? Its almost identical, will it work?

You really have to get a replacement spring. I realy cant say but it woudnt hurt if you try  (better compare the two first) Its actually just  a dust cover I have a few aegs without em heheh.  :lol:

#8 eleeschalow

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Posted 04 January 2009 - 01:07 PM

WOW so that little spring that i never needed before completely fixed my misfeeding issue. Thank you so much for Karmeister.  Now i just gotta figure out how to fix the mock bolt.

Posted Image

Edited by eleeschalow, 04 January 2009 - 01:11 PM.


#9 Lt. Tony

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Posted 04 January 2009 - 02:34 PM

I was coming home to tell you that. I lost my little spring (chamber block spring, Part No.#162). a few days, ago and had to get another one. That little spring can affect everything from loss of FPS to misfeeds. And when it's gone you mock recevier won't return like it's supposed to. It will like get stuck.

#10 eleeschalow

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Posted 04 January 2009 - 03:02 PM

I must say all of you guys have been great help! I did replace the mock bolt and it wont get jammed anymore. I didnt replace mine wit hte KWA spring. I removed the small spring from a ball point pen and glued the end of it to the little bump so it would stay in place and it works perfectly. Thanks again!

#11 vic_man4

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Posted 04 January 2009 - 06:49 PM

View Posteleeschalow, on Jan 4 2009, 04:02 PM, said:

I must say all of you guys have been great help! I did replace the mock bolt and it wont get jammed anymore. I didnt replace mine wit hte KWA spring. I removed the small spring from a ball point pen and glued the end of it to the little bump so it would stay in place and it works perfectly. Thanks again!

Nothing like some do-it-yourself to fit the problem!
Ill add that to my mental "misfeed checklist" when people come up to me with that problem!
Never had that issue occur to me or any others at my feild, but who knows eh?




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