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kwa sr10 problem

kwa sr10 problem hopup barrel

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#1 bradybunches

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Posted 04 December 2013 - 06:09 PM

I just recieved my new kwa sr10. I turned the hopup all the way up and the bb went a little bit higher than when it was all the way down. I was using .25 gram bbs by evike. Could this already be a ripped bucking?

#2 vanevery

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Posted 04 December 2013 - 06:32 PM

Most likely not.
You most likely have one of two issues or both.

One:
Oily Bucking.
All new airsoft guns shoot out excess grease from the gearbox that is in the Cylinder.
This grease dirties the Cylinder and Air Nozzle, the Inner Barrel, and the Bucking.
If there is grease on the Bucking, then the actual rubber is not contacting the BB thus no spin is being applied.
Solution: Properly and thoroughly clean the Inner Barrel, Hop-up Unit and Bucking.
Also use a Cleaning Rod and Patch or possibly a Q-tip to clean what you can access of the Cylinder Nozzle and Air Nozzle.
This alone will noticeably improve your out of the box shooting performance of your KWA gun.

Two:
The Hop-up Nub is slightly cut over sized.
I had this issue in two of my KWA guns.
The solution is to drop the Chamber Arm of your Hop-up Unit and access and remove the Nub.
Then, take a Razor and trim the width of the Nub.
I use the width of the razor as my control, that seems to do the trick.
After this is done, the Nub will freely raise and lower in the Barrel Window whereas before it was getting stuck.

#3 Rain Man

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Posted 10 December 2013 - 06:45 AM

If i were you i would remove the bucking, give it a rinse in warm soapy water for 4-5 hours,  then reassemble the hop up unit. Adjust the nub and the bucking as well, as this could also be effecting the hop. Vanevery is right you could have to trim down the nub, but i would try that as a last resort. I had the same problem and cleaning everything in the unit helped a ton.

#4 Rain Man

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Posted 10 December 2013 - 06:47 AM

View PostRain Man, on 10 December 2013 - 06:45 AM, said:

If i were you i would remove the bucking, give it a rinse in warm soapy water for 4-5 hours,  then reassemble the hop up unit. Adjust the nub and the bucking as well, as this could also help. You should definitely clean the barrel too. Vanevery is right you could have to trim down the nub, but i would try that as a last resort. I had the same problem and cleaning everything in the unit helped a ton.


#5 Jesse Hammil

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Posted 17 December 2013 - 01:04 PM

I had this issue with my RIS. even after the break in period, tho hop up wasn't working well.  Others are right, take off the bucking and wash it with warm soapy water and let it dry.  It took mine a few times of washing. There was a lot of oil getting in there.

#6 niko_gpsy

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Posted 24 December 2013 - 03:17 PM

If the bucking is indeed contaminated with gearbox grease, it will take more than a rinse to clean the bucking.  I would first soak the bucking in a warm solution of dish soap and water over night.  Then use a Q-tip to clean the bb contact surface inside the bucking.  Resoak, rinse and then let air dry on some paper towels.  This should get it clean. :)




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