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Kwa sr7

KWA SR7 SR10 FPS KM4 SR12 LOW

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#1 Cory117

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Posted 26 May 2013 - 02:18 PM

Hey I'm wondering about my sr7 it seems to be very low in fps for example,when I chrono it,it usually gets around 290 when I got it out if the box and now since I have adjusted the fps it is around 320ish with 0.20 so I'm wondering is their a problem with my gun or is it my bbs any info will be great thanks!

#2 Airsoft Fan

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Posted 26 May 2013 - 03:10 PM

What kind of BBs are you using?*






*Someone was going to ask that so I figured I'd beat them to it :innocent:

Edited by Airsoft Fan, 26 May 2013 - 03:10 PM.


#3 TicTac

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Posted 26 May 2013 - 04:34 PM

ya probably the gun

#4 Cory117

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Posted 26 May 2013 - 07:04 PM

Do you know what it might be?


#5 gcw360

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Posted 27 May 2013 - 12:28 PM

View PostCory117, on 26 May 2013 - 07:04 PM, said:

Do you know what it might be?
Hi Cory117, there could be a number of reasons you are loosing compression. I have a couple of questions.  How old is your gun and have there been any mods at all to it?

I would start by looking at the bucking to see if it is damaged and needs to be replaced.  Next I would eliminate other compression parts such as the o-ring, nozzle, and cylinder head. If you are comfortable opening the gearbox, I would start by installing, and properly stretching, a #14 Danco o-ring.  From there check the other parts mentioned.

Hope this helps.

#6 Cory117

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Posted 27 May 2013 - 06:20 PM

View Postgcw360, on 27 May 2013 - 12:28 PM, said:

Hi Cory117, there could be a number of reasons you are loosing compression. I have a couple of questions.  How old is your gun and have there been any mods at all to it?

I would start by looking at the bucking to see if it is damaged and needs to be replaced.  Next I would eliminate other compression parts such as the o-ring, nozzle, and cylinder head. If you are comfortable opening the gearbox, I would start by installing, and properly stretching, a #14 Danco o-ring.  From there check the other parts mentioned.

Hope this helps.

Re:It is about 4 months old and it came like this I thought it was normal until I saw some other videos

#7 niko_gpsy

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Posted 31 May 2013 - 01:07 PM

When was the last time you cleaned your barrel and bucking?  A dirty barrel can result in low and irratic FPS readings.  Also you may want to check and make sure the hopup unit "bounce" back when pushed toward the front of the gun.  If it does not the air nozzle and bucking will not make good airseal that can lead to FPS drops.  And check you bucking for small tears or just try a new bucking.




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