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Cylinder head and nozzel.


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#1 rccapps

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Posted 23 November 2013 - 12:57 PM

Could someone please give me some advice, I seem to have a bad air nozzell on my km4. It started to shoot a very low fps and bbs would only shoot out about 20 ft. I thought it was thehopup. I swapped complete barrel and hopup from my other km4 same issue. After checking the gear box air seal twice still the same. I had a generic air nozzell from another brand,installed it, has it shooting now but the fps is down about 30 fps. Now my question, is a kwa air nozzel the one that will work? The pro shop is out at this time. Also would it be a good idea to change the cylinder head at the same time. If so what will work? Sorry for the long post.
Thanks in advance for your help

Edited by rccapps, 23 November 2013 - 01:01 PM.


#2 gcw360

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Posted 23 November 2013 - 01:23 PM

View Postrccapps, on 23 November 2013 - 12:57 PM, said:

Could someone please give me some advice, I seem to have a bad air nozzell on my km4. It started to shoot a very low fps and bbs would only shoot out about 20 ft. I thought it was thehopup. I swapped complete barrel and hopup from my other km4 same issue. After checking the gear box air seal twice still the same. I had a generic air nozzell from another brand,installed it, has it shooting now but the fps is down about 30 fps. Now my question, is a kwa air nozzel the one that will work? The pro shop is out at this time. Also would it be a good idea to change the cylinder head at the same time. If so what will work? Sorry for the long post.
Thanks in advance for your help
I would try calling KWA to see if the nozzle is in stock. It really is the best choice with a KWA cylinder head.

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#3 vanevery

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Posted 24 November 2013 - 09:57 AM

If it is only your air nozzle, then I agree with gcw.
Get a stock KWA air nozzle. I know this vendor has KWA Air Nozzles in stock: http://www.airsoftru...in/commerce.cgi

One thing you can try with what you have is a TM Compatible Hop-up Unit.
I say this because you stated that you installed a generic air nozzle.
If this generic air nozzle is TM compatible, then it may work just fine in your KWA gun using a TM compatible Hop-up Unit.

If none of these options work, I suggest a new stock KWA Cylinder Head for your gun.

#4 rccapps

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Posted 25 November 2013 - 02:23 PM

Found my problem. Pryor to going to OP Fulda Gap for no real reason I streched the springs on all 11 of my km 120 mid cap mags. After thinking what I might have done that came to mind. What I believe was happening was it was putting to much presure on the hopup causing it to lose the air seal. I had a new k120 mag the 8 I took the spring out of and compared it to the 11 the ranged from 1 inch to 2 inches longer. What a mistake. To fix them I cut te excess and they seem to be fine. Lesson learned be careful.











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