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Old 11-01-2012, 08:33 AM   #1
Young Gun
 
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Barrel porting question

Hi forum,

As a lot of you know I have HPA KC02. I will be receiving in the mail soon my RA Tech custom 6.03 650mm barrel. My question is since its 6.03 would porting be necessary.

Thanks
Kevin
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Old 11-01-2012, 12:39 PM   #2
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Impossible to answer. Why would port in the first place, and how would you port it? I'm assuming you have ported a barrel before...?
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Old 11-01-2012, 01:24 PM   #3
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Originally Posted by dragon64 View Post
Impossible to answer. Why would port in the first place, and how would you port it? I'm assuming you have ported a barrel before...?
The idea is that it bleeds off extra air before the bb leaves the control of the barrel. Having an over volumed system will throw off your accuracy.
Edgi barrels do porting.

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Old 11-01-2012, 02:10 PM   #4
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Originally Posted by ssgspeedman55 View Post
The idea is that it bleeds off extra air before the bb leaves the control of the barrel. Having an over volumed system will throw off your accuracy.
Edgi barrels do porting.

Kevin
Thank you kevin, that was quite helpful.
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Old 11-01-2012, 05:17 PM   #5
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It basically reduces the velocity because some air is lost before exiting the barrel.
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Old 11-01-2012, 05:47 PM   #6
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Personally, I don't see the purpose in porting unless you have an LRB, and even then...

I'm not familliar with the KC02 in operation, so take this with a grain of salt. But if you have excess air volume, and its not adjustable I dont see how it would hurt accuracy if you ported the barrel. However Porting the barrel is basically the same as just cutting off the end, unless you have an LRB. If you hae an LRB it relies on the entire barrel length to put the back spin on the BB, moreso than a normal hop up.
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Old 11-01-2012, 06:59 PM   #7
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It looks cool... that is about all.

Though I am looking at doing the same thing with my KC-02, though I currently have an Npas in the rifle so I can adjust her when needed. But on a rifle where you have no adjustment you will loose power before the bb leaves the barrel.
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Old 11-09-2012, 12:07 PM   #8
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Originally Posted by woogie View Post
It looks cool... that is about all.

Though I am looking at doing the same thing with my KC-02, though I currently have an Npas in the rifle so I can adjust her when needed. But on a rifle where you have no adjustment you will loose power before the bb leaves the barrel.
what is you NPAS made by?
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Old 11-09-2012, 12:51 PM   #9
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Ra tech, guess it is for an m4
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Old 11-09-2012, 02:14 PM   #10
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Originally Posted by woogie View Post
Ra tech, guess it is for an m4
Is it for a KJW m4?
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Old 11-09-2012, 04:07 PM   #11
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Why would you port the barrel not the cylinder if its over volumed?
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Old 11-09-2012, 04:11 PM   #12
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Originally Posted by Lightbulb View Post
Why would you port the barrel not the cylinder if its over volumed?
Because it's a gas rifle...
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Old 11-09-2012, 07:39 PM   #13
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Why not wait till you get it, test fire it, then decide?
I recently put a 6.01mm X 650mm into my POS gun (But it's what I've got), and I ported it.
But for a different reason.
Works fabulously.
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Old 11-10-2012, 04:36 AM   #14
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Quote:
Originally Posted by akfortyseven View Post
Because it's a gas rifle...



That is all.

But in my defence its not really 'over volumed' then is it, it just doesn't have a NPAS :)

Last edited by Lightbulb; 11-10-2012 at 04:40 AM.
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Old 11-10-2012, 10:05 AM   #15
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Um.....yah..... I need to get NPAS because with the with the RA tech bucking and 510mm 6.01 barrel, my min fps is 480 with .25s. need to get it to 450fps.

Kevin
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