KWA Kriss Vector issue

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Schultz

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Hi all,

I have a issue with mine KWA Kriss Vector. After a few single shots the trigger is not resetting properly. I have to pull the trigger again (sometimes twice) will here a click and it will fire then the same issue occurs. 2 round burst and auto work properly. I cleaned the Vector and relubed it. Inside everything looks good, no broken bits. I use Nuprol 3.0.  Somebody has any idea, like to play with it again!!

 
It could be a number of things, but worn semi auto sear is most likely.

If you search you tube for Rhesus Airsoft you’ll see Thomas has a fix that often works.

Getting hold of a semi-auto sear could be tricky, but the real steel KRISS sear is identical to the KWA version

rdb

 
Thanks for the info. I did already saw the video. But first wanted to ask around if there were other solutions for the problem or maybe it was something totally different. When i relubed it the Sera looked fine by me. Will open it again this week and check it again.

rocketdogbert said:
It could be a number of things, but worn semi auto sear is most likely.

If you search you tube for Rhesus Airsoft you’ll see Thomas has a fix that often works.

Getting hold of a semi-auto sear could be tricky, but the real steel KRISS sear is identical to the KWA version

rdb
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What kind of other things could it be rocketdogbert?

 
Schultz said:
What kind of other things could it be rocketdogbert?
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Worn primary sear (trigger bar), worn primary hammer, over stretched primary hammer spring, worn trigger, damaged semi-sear spring or cup, bent secondary hammer bar(s).

I think that’s about it. Where are you based?

rdb

 
Good pics

The important part of the sears is the tip that interacts with the primary hammer, the bit your holding that we can’t see, same with the hammer, need to see the sear runners.

ANY shape change in the tip of the sears or the hammer runners could be the problem, particularly if there is any sort of lip.

The whole gun has very tight tolerances, any wear will stop it running well.

I’ll glad check it out for you, but you’d have to ship it to the UK lol

 
Wrong end of the hammer, it’s the bearing end that the sears sit on.

Your pics are a bit dark, but it does look like the sear tip is worn.

Any issues will full auto or burst at all?

Personally, I’d try the Rhesus fix (take a tiny amount off, even though the sears are steel, they aren’t hardened, just a few strokes)

BUT before you do, assemble the sears, and run through a cycle as Rhesus shows. Keep running through until you are happy you understand how it works, as it is relatively complex with trigger pulled and not pulled.

It sounds like the semi sear is not engaging the hammer once the primary sear is released by the trigger, but check it very careful. 

airsoft-club.com have replacement semi-auto sears

 
Tomorrow i will make some better photo’s with daylight.

rocketdogbert said:
Any issues will full auto or burst at all?
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No issues with full auto or burst. 

rocketdogbert said:
Personally, I’d try the Rhesus fix (take a tiny amount off, even though the sears are steel, they aren’t hardened,   just a few strokes)
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If i understand correct Rhesus means you have to sand a bit under the knob and not the sear edge. Or am i wrong?

View attachment 43669

 
Schultz said:
Hi all,

I have a issue with mine KWA Kriss Vector. After a few single shots the trigger is not resetting properly. I have to pull the trigger again (sometimes twice) will here a click and it will fire then the same issue occurs. 2 round burst and auto work properly. I cleaned the Vector and relubed it. Inside everything looks good, no broken bits. I use Nuprol 3.0.  Somebody has any idea, like to play with it again!!
Click to expand...
Click to shrink...


It could potentially be a worn trigger bar as well (less likely than a worn sear). JUst be very careful to not remove too much off the post or you'll ruin the sear and have to scour the net for a replacement. 

Impuls101 carries quite a few spares should you need them but unfortunately not semi sears 

While its apart id pick up a 3d printed trigger for it, it makes a massive change to the way the gun feels to shoot and cant recommend it enough.he does sell it on shapeways but its very expensive on there, send him a message on his facebook page and you should be able to get it for the cheaper price he mentions . :)  

Hopefully you fix your trigger problem quicker than me and @rocketdogbert spent fixing mine. ( over a period of probably nearly a year. :(  ) Let us know how you get on 

 
Last edited by a moderator:
I changed the photo’s in mine last photo post. with better light. 

I just searched in mine big box of  spareparts and i have both sears spare (number 12 and 13). I thought i only had the hammer spare. So replace the old ones and good to go right?

 
Last edited by a moderator:
Good stuff, you can replace both, but you only need to replace the semi-auto sear.(36)

However, you MUST cycle the trigger pack as above to be sure the primary sear part 27 isn’t worn, and no other components are out of spec.

I would highly recomend fitting Rhesus 3D trigger kit as well

 
I replaced the semi sear with a new one and again 5 single shots fire fine. But with shot number 6 i had to pull the trigger 2 or 3 times to get a shot the same for shot 7 etc. Burst and full-auto work fine. If i switch to burst and fire and then switch back to single i get one good shot and the rest will fail again. 

 
Did you cycle the sears like I suggested to see if the primary sear (trigger bar) is worn?

Easiest way to do it is reinstall the trigger pack correctly (no bent sear retention springs) and remove the ejection port so you can see what’s going on.

I can show you what happens with semi only, but I have no burst or auto sears in my gun

 
If i pull the trigger, when in semi, the hammer will not fire. The primary sear lifts but the hammer is stuck on the semi sear.  If i push the auto sear (on the right) when it is on semi and pull the trigger the hammer will fire. Is that normal? I will try to make a video. 

View attachment 43959

 
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