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KJW m4 fps question ?!!

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Old September 14th, 2013, 00:29   #1
KJWm4
 
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KJW m4 fps question ?!!

What's an average fps right out of the box is every body seeing ?
What's a good fps and a bad fps out of the box be ?
With the V2 bolt and V1 bolt have different fps?
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Old September 14th, 2013, 01:09   #2
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I have the V2 bolt using propane and seeing 430 fps for the high.
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Old September 14th, 2013, 02:52   #3
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what grams of bb are you using?
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Old September 14th, 2013, 03:57   #4
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.25 air soft elite precision
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Old September 17th, 2013, 17:14   #5
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That is typically what the kjw m4's shoot stock.

Research the cradle velocity reducer. You don't need the reducer just replacement plastic rings that you can put on the original valve for better results.
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Old September 18th, 2013, 21:20   #6
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What kind of better results ?
Just curious.
Would a guy wanna get the v1-2 bolt from them guys also ?
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Old September 18th, 2013, 21:33   #7
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Kjs typically shoot over the limit stock, depending on the weather.
Also due to it being a gbbr, using heavier ammo will actually increase the muzzle energy drastically, making it even more over the limit lol
Definitely get a cradle reducer
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Old September 19th, 2013, 14:22   #8
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Sweet.
10/4 on the velocity reducer.
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Old September 25th, 2013, 09:27   #9
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You DO NOT need the velocity reducer. Its a 45 dollar part. You can just buy the plastic o rings from them for 5 bucks and you get a better range of fps.... your stock valve has more gas flow whereas the velocity has just two slits which limits you drastically. Also the velocity reducers o ring is weak and breaks and moves around easily. Using the replacement plastic o rings with your stock valve and o ring that is current on it is way more effective.

You also WANT a version 2 bolt. The v1 has a stupid elastic band.
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