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KWA Trigger Contact Block Broke


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#1 WiN&LeGeNd

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Posted 27 December 2008 - 08:18 PM

I just got done re-assembling my KWA M16, integrated a MOSFET trigger system into it, and then I pulled the trigger a few times and then the trigger kept getting stuck back, it wouldn't spring return, took it apart, and I found that the trigger contact block broke in half! The rarest part to every actually break, and mine broke in half, lol. How I'm not exactly sure, but it is somewhat of a wedge shape on the bottom, and its thin there, which is where it broke. Anyhow, there is an easy fix if this happens to anyone, CA glue(aka super glue). I used Loctite Super Glue ULtra Gel, its pretty good stuff, I use it for glueing tires on my E-Revo(4x4 R/C monster truck). Anyhow, I glued the seem back together where it broke, then I gobbed it up under the silver contact and let it dry, so it should be much stronger than originally with the extra glue support I made. Its a cheap and good fix for that part if anyone ever breaks it. For future reference to KWA, maybe they could make it a little thicker or different type of material? I think a little more flexible plastic, like nylon would have prevented that from happening. Hope this helps. If I recall there was a post not to long ago with the same or similar symptoms, I think that may have been the cause. Perhaps it just a fluke with recent batches as mine was bought new in Nov., I believe the two M16's were recent in that post as well.

Keep it going KWA!

BTW even the M130 spring has a ridiculous ROF with my 11.1v LiPo. They are awesome power sources.5

Edited by WiN&LeGeNd, 27 December 2008 - 08:23 PM.


#2 Guest_allizard_*

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Posted 27 December 2008 - 08:46 PM

Jeebus....  Can you show me picture where is the break?!  If it's the block behind the trigger assembly then that is the trigger post.  The last batch should have the new trigger post reinforced but I need to see the a picture to confirm it.

#3 WiN&LeGeNd

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Posted 29 December 2008 - 06:12 AM

View Postallizard, on Dec 27 2008, 11:46 PM, said:

Jeebus....  Can you show me picture where is the break?!  If it's the block behind the trigger assembly then that is the trigger post.  The last batch should have the new trigger post reinforced but I need to see the a picture to confirm it.

The part I am talking about is not  part of the mech-box shell, its literally the sliver wedge that slides in between the contacts to make an electrical connection. Obviously this piece has to be surrounded by a non conducting material, which most afford ably is plastic. Now there is nothing wrong with the metal block, but what broke was the whole front part of the plastic block the metal contact sits in. The whole horizontal plane, the part that sits in the grooves to hold it straight broke in half where it dips up and gets thin. I would suggest a more flexible plastic over a rigid one, its not an extremely high stress part and somewhat flexible plastic would do fine, that's what Marui guns have always used, a nylon type plastic. I don't even think you'd need a design change, just materials.

Posted Image

Look at the lower half of the yellow box, the silver contact wedge and block that slides forward into the trigger contacts, that block broke in half along the thin part on the bottom of the wedge so when I would press the trigger the contact would not engage properly causing both the trigger to not return from being depressed but also cause random trigger response. I used Loctite super gel glue and it's holding fine, and easy fix for those who encounter that issue.

#4 brooklyn468

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Posted 29 December 2008 - 11:37 AM

Look at the bright side, buying a new trigger contact is a lot cheaper than buying a new gearbox shell :lol:

#5 WiN&LeGeNd

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Posted 30 December 2008 - 12:30 PM

View Postbrooklyn468, on Dec 29 2008, 02:37 PM, said:

Look at the bright side, buying a new trigger contact is a lot cheaper than buying a new gearbox shell :lol:

Yes that is very true, but in any case I didn't have to buy a new one, super glue solved the problem quite well. Still, its not a part that should break, and mine may have been a fluke, so its not a big deal. In the event that others start or have had this problem though, I thought it wise to at least bring it to the attention of KWA so they could improve their product which is already leaps and bounds above the rest. But it never hurts to improve it even more!

#6 Guest_allizard_*

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Posted 30 December 2008 - 05:45 PM

If it's under warranty we can send you a replacement.  I'm just curious exactly where it breaks.




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