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M4A1 M16 Barrel Upgrade


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#1 darkfang68

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Posted 07 December 2008 - 09:40 AM

I am considering buying an M16 length barrel for my KWA M4 because I know have a handguard and outer barrel that can easily fit it.  I know that it will be neccessary for me to upgrade the cylinder to an M16 cylinder in order to do this but my question is what else do I need.  I have a friend who says that is it but I'm not sure because on AEGs it's never that simple.  Anyone who knows exactly what I need to do to allow this barrel to achieve maximum range and accuracy please let me know.

#2 Stealthmaster14

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Posted 07 December 2008 - 10:36 AM

You are buying an M16 length tightbore, correct?  To my knowledge, all you should need is a non-ported (type O) cylinder.  For tightbores, if you want maximum range and accuracy, you might try an Edgi 6.01mm barrel

http://www.edgicusto...om/#aeg_barrels

I've heard they make barrels specifically for KWA M4s.  Since they are not on the sight, you might try and call and ask them.  (that's how you order anyway)  

If you are looking for maximum range and accuracy, an H nub would help, as would getting your compression perfect.

#3 darkfang68

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Posted 07 December 2008 - 02:28 PM

View PostStealthmaster14, on Dec 7 2008, 01:36 PM, said:

You are buying an M16 length tightbore, correct?  To my knowledge, all you should need is a non-ported (type O) cylinder.  For tightbores, if you want maximum range and accuracy, you might try an Edgi 6.01mm barrel

http://www.edgicusto...om/#aeg_barrels

I've heard they make barrels specifically for KWA M4s.  Since they are not on the sight, you might try and call and ask them.  (that's how you order anyway)  

If you are looking for maximum range and accuracy, an H nub would help, as would getting your compression perfect.

That's funny I am actually ordering a 6.01 EDGI.  Also, I already have a TM stock hopup and systema bucking (also a firefly) so I'm set on barrels/buckings/hopups.  I just need to know what else i need.  so type O cylinder is all i need to make it work?

#4 Stealthmaster14

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Posted 07 December 2008 - 03:15 PM

View Postdarkfang68, on Dec 7 2008, 03:28 PM, said:

That's funny I am actually ordering a 6.01 EDGI.  Also, I already have a TM stock hopup and systema bucking (also a firefly) so I'm set on barrels/buckings/hopups.  I just need to know what else i need.  so type O cylinder is all i need to make it work?


You will need a different air nozzle if you swap out the KWA hop up unit for a TM one.  Guarder is good from what I hear

#5 vic_man4

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Posted 07 December 2008 - 03:37 PM

View PostStealthmaster14, on Dec 7 2008, 04:15 PM, said:

You will need a different air nozzle if you swap out the KWA hop up unit for a TM one.  Guarder is good from what I hear
Or you could sand down the edges on stock one if your broke :lol: Your going to have to downgrade your spring to a M100 because a type 0 will give you 500fps and the tbb will make you well over feild legal. Whats the FPS range your looking for?

#6 darkfang68

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Posted 07 December 2008 - 04:01 PM

View Postvic_man4, on Dec 7 2008, 06:37 PM, said:

Or you could sand down the edges on stock one if your broke :lol: Your going to have to downgrade your spring to a M100 because a type 0 will give you 500fps and the tbb will make you well over feild legal. Whats the FPS range your looking for?

With the hop up and everything I installed that a while ago with a systema nozzle.  I know everything about that.  As for FPS I can't shoot over 450 with a .25.  right now i have a prommy tightbore and a few other custom internals and im shooting around 390.  Does the zero cylinder really up it that much?  If it does won't it work exactly the same to just get a systema m16 area 1000 cylinder?  Why do I necessarily need a type O?

Edited by darkfang68, 07 December 2008 - 04:05 PM.


#7 vic_man4

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Posted 07 December 2008 - 06:55 PM

View Postdarkfang68, on Dec 7 2008, 04:01 PM, said:

With the hop up and everything I installed that a while ago with a systema nozzle.  I know everything about that.  As for FPS I can't shoot over 450 with a .25.  right now i have a prommy tightbore and a few other custom internals and im shooting around 390.  Does the zero cylinder really up it that much?  If it does won't it work exactly the same to just get a systema m16 area 1000 cylinder?  Why do I necessarily need a type O?

heres the airsoft 101 type 0's.
You need enough air to push the bb through the barrel. To little air (a ported cylinder) may result in your bb not travelling all the way through your barrel before your gun cycles again causing it to suck the bb back causing you to lose quite a bit fps. So more air pushing the bb out results in more fps.

Edited by vic_man4, 07 December 2008 - 06:56 PM.


#8 Stealthmaster14

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Posted 07 December 2008 - 07:02 PM

View Postvic_man4, on Dec 7 2008, 07:55 PM, said:

heres the airsoft 101 type 0's.
You need enough air to push the bb through the barrel. To little air (a ported cylinder) may result in your bb not travelling all the way through your barrel before your gun cycles again causing it to suck the bb back causing you to lose quite a bit fps. So more air pushing the bb out results in more fps.

Yeah, but I don't think it will add 100 fps.   :blink:  

SRC G36 series all come with non ported cylinders and they all chrono at around 350 fps with the stock spring. (M110)  If non ported cylinders really gave you that much of a boost, why not install them in any gun?  Sure you'd lose a little ROF, but the FPS boost would be worth it.

#9 darkfang68

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Posted 07 December 2008 - 07:17 PM

View PostStealthmaster14, on Dec 7 2008, 10:02 PM, said:

Yeah, but I don't think it will add 100 fps.   :blink:  

SRC G36 series all come with non ported cylinders and they all chrono at around 350 fps with the stock spring. (M110)  If non ported cylinders really gave you that much of a boost, why not install them in any gun?  Sure you'd lose a little ROF, but the FPS boost would be worth it.

okay so here's the deal.  I'm not so much concerned about raising FPS as I am
about making my barrel compatible.  that's all I am looking for.  is this basically what you are saying:

any m16 cylinder will work but a type 0 provides more air pressure and will increase your fps but decrease your rof? if I can get more fps and stay under 450 for a .25 that would be great but I can't go over that.

also where would I find a good type 0 cylinder or regular cylinder (money is not important) and is there any other parts I would need besides the cylinder?

#10 vic_man4

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Posted 10 December 2008 - 05:31 PM

View Postdarkfang68, on Dec 7 2008, 07:17 PM, said:

okay so here's the deal.  I'm not so much concerned about raising FPS as I am
about making my barrel compatible.  that's all I am looking for.  is this basically what you are saying:

any m16 cylinder will work but a type 0 provides more air pressure and will increase your fps but decrease your rof? if I can get more fps and stay under 450 for a .25 that would be great but I can't go over that.

also where would I find a good type 0 cylinder or regular cylinder (money is not important) and is there any other parts I would need besides the cylinder?

I got my JB Unicorn cylinder from GI cause Area 1000's were outta stock, works fine and I think it was $15.

#11 vic_man4

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Posted 10 December 2008 - 05:32 PM

View PostStealthmaster14, on Dec 7 2008, 07:02 PM, said:

Yeah, but I don't think it will add 100 fps.   :blink:  

SRC G36 series all come with non ported cylinders and they all chrono at around 350 fps with the stock spring. (M110)  If non ported cylinders really gave you that much of a boost, why not install them in any gun?  Sure you'd lose a little ROF, but the FPS boost would be worth it.

The bb escapes the barrel before all the air escapes the cylinder so you lose a lot of air and fps, if you were to extend the barrel all the way to a 650mm like mine you would get maximum air and get a high resulant FPS.

#12 karMeister

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Posted 10 December 2008 - 05:54 PM

View Postvic_man4, on Dec 10 2008, 05:32 PM, said:

The bb escapes the barrel before all the air escapes the cylinder so you lose a lot of air and fps, if you were to extend the barrel all the way to a 650mm like mine you would get maximum air and get a high resulant FPS.


Yes you will lose the momentum. And you have to take airleaks into consideration. Your best teacher is experience... trial and error  :D  Play around with it.




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