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Hop-up bucking


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#1 mechwar420

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Posted 09 October 2010 - 03:09 PM

With all the buzz about the hop-up bucking and it swelling.
Is KWA coming up with a solution to the problem?
I've been reading around the forums and they say the aerosol forms of silicone lube make the bucking swell, and also green gas that has an aerosol form of silicone.
I've been using the ICS spray silicone oil on my M17 for the past 5 years, and have never had a problem.
What makes the bucking different now that it would act like this with the silicone lube?

#2 gcw360

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Posted 10 October 2010 - 07:28 AM

 mechwar420, on 09 October 2010 - 03:09 PM, said:

With all the buzz about the hop-up bucking and it swelling.
Is KWA coming up with a solution to the problem?
I've been reading around the forums and they say the aerosol forms of silicone lube make the bucking swell, and also green gas that has an aerosol form of silicone.
I've been using the ICS spray silicone oil on my M17 for the past 5 years, and have never had a problem.
What makes the bucking different now that it would act like this with the silicone lube?

The swelled buckings that I have heard about have been with propane and or silicone being added for lubrication.  It is from over lubrication.  I've not heard it happening with green gas and that's probably because it's the proper mix for the gun.   IF that's not the case then someone chime in.

I have an MP7 that I've fired thousands of rounds through using green gas without issue.  :gun:

#3 mechwar420

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Posted 10 October 2010 - 08:04 AM

http://www.airsoftpo...oducts_id=27704
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I've been using this gas for the gun so far, and the bucking ended up swelling on me, and had the jamming issues.  I've been using that gas for a while now with my M17 and notice sometimes there being some silicone residue on the internals.
I then ended up going to Airsplat to pick up a case of gas, and stopped using the stuff from Evike.

#4 xKingSizex

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Posted 10 October 2010 - 11:38 AM

Both guns use the same bucking.

#5 mechwar420

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Posted 10 October 2010 - 12:27 PM

 xKingSizex, on 10 October 2010 - 11:38 AM, said:

Both guns use the same bucking.

Really?  B/c I've been using an aerosol based lubricant for the M17 and never had any problems

#6 Spiggy

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Posted 11 October 2010 - 10:50 AM

dimensions of the hopup unit also play a role in the function of a gun.  

The MP7 has a tight hopup unit and requires the specific size to function or it will jam.  

A M17 on the other hand only has a partial "hood" for the hopup unit.  If it expanded, the gun may still function, but most guaranteed that the hopup bucking is probably out of spec for the MP7.

#7 Vamp2269

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Posted 26 October 2010 - 02:46 PM

Has there been a solution to the problem and if so what is an ETA on when the improved parts are available? My mp7 started doing it and I will be using my Op freefal coupon for the repair, but I want to make sure the repair is permanant and the problem won't happen again. Or is this going to be the MP7's RROD(Red Ring Of Death) forever?

Edited by Vamp2269, 26 October 2010 - 02:47 PM.


#8 dobey

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Posted 26 October 2010 - 03:05 PM

Just wash it with dish detergent in the sink and don't oil it so much, goes away and never comes back unless you over oil it again.

#9 Vamp2269

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Posted 27 October 2010 - 12:56 PM

 dobey, on 26 October 2010 - 03:05 PM, said:

Just wash it with dish detergent in the sink and don't oil it so much, goes away and never comes back unless you over oil it again.

Really? If that works that's awesome I just need to get the .89mm hex kew then I should be set to field strip it and clean up the bucking. But what about the part in the air seal chamber that swells up too.

#10 Guest_allizard_*

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Posted 27 October 2010 - 01:33 PM

.89 Hex screw is available in our proshop.

#11 cjboi

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Posted 27 October 2010 - 02:34 PM

Or you guys can get the hex key for .87 cents plus shipping. It should be cheaper since you guys are from the US. Here's the link -->.9 hex key This is what I use for my mp7. :D hope this helps

#12 Vamp2269

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Posted 28 October 2010 - 09:03 PM

 allizard, on 27 October 2010 - 01:33 PM, said:

.89 Hex screw is available in our proshop.

I know, but is in stock right now?

And does regular dish soap work or do I need liquid detergent for like a dish washing machine?

#13 dobey

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Posted 29 October 2010 - 04:00 AM

Anything that cuts grease and oil.  Normal soap for washing your dishes in the sink will work fine.

#14 Vamp2269

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Posted 29 October 2010 - 12:16 PM

okay cool.

#15 cjboi

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Posted 29 October 2010 - 01:02 PM

My link




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