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#1 somthing2000

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Posted 08 February 2014 - 11:12 AM

Hello, I need help. . what motor does the KWA KM4 SR7 use? (Long, short, etc.)
Also what stock spring does use and what is it equal to? Because I have stock spring and I use .25g and the FPS is 299! I want it to be 330 or at least 320 with .25g. . . Also any tips on how I can get that FPS?

And sorry for picture. . idk why Its that and I cant change it lol?

#2 tales

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Posted 08 February 2014 - 08:19 PM

Long motor. The gun shoots around 340fps with .20s. If your gun is shooting 299fps with .25 thats about 335 with .20
Spring is a M120 Maybe a M130 spring will get .25 shooting  330 or hotter.

#3 gcw360

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Posted 08 February 2014 - 09:46 PM

View Posttales, on 08 February 2014 - 08:19 PM, said:

Long motor. The gun shoots around 340fps with .20s. If your gun is shooting 299fps with .25 thats about 335 with .20
Spring is a M120 Maybe a M130 spring will get .25 shooting  330 or hotter.
Pretty much a spot on response....Welcome to the KWA Forums!

#4 tales

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Posted 09 February 2014 - 02:50 PM

I checked my sons SR7 it was shooting around 300fps with.20s

Using the stock cylinder & head, i added a ported 14T full metal piston, POM piston head with new O-ring. 30 weight silicone shock oil on piston head O-ring, 100% pure silicone grease  for air nozzle seal & a KWA M130 spring.

This is the result using .25s
Posted Image

#5 cheapairsofter

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Posted 09 February 2014 - 04:08 PM

can i fix this myself?
my 1911 magazine falls off the gun when firing it?
help!! thanks!

#6 gcw360

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Posted 09 February 2014 - 07:06 PM

View Postcheapairsofter, on 09 February 2014 - 04:08 PM, said:

can i fix this myself?
my 1911 magazine falls off the gun when firing it?
help!! thanks!
OK, three posts for the same question...Really?  See my PM please.




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