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-   -   KJW m4 fps question ?!! (https://airsoftcanada.com/showthread.php?t=158440)

KJWm4 September 13th, 2013 23:29

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?

KJWm4 September 14th, 2013 00:09

I have the V2 bolt using propane and seeing 430 fps for the high.

redzaku September 14th, 2013 01:52

what grams of bb are you using?

KJWm4 September 14th, 2013 02:57

.25 air soft elite precision

daishi September 17th, 2013 16:14

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.

KJWm4 September 18th, 2013 20:20

What kind of better results ?
Just curious.
Would a guy wanna get the v1-2 bolt from them guys also ?

ThunderCactus September 18th, 2013 20:33

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

KJWm4 September 19th, 2013 13:22

Sweet.
10/4 on the velocity reducer.

daishi September 25th, 2013 08:27

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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