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Kwa M4s Tactical Barrel length


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#1 hammer

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Posted 28 June 2008 - 09:22 PM

guys can anybody tell me the EXACT inner barrel length of the KWA m4s tactical? Im planning to get a tightbore for my gun

#2 Rockhound

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Posted 29 June 2008 - 05:08 AM

Its 394 mm! Call DB Customs for exact customized length if you want. I haven't found any TB with the exact measurement, either you get a shorter one or a longer one. Got mine from AEX. They have the 384 mm one. Its one cm shorter but it works! You could also use 409mm without any barrel extensions.

Check the forum for compatibility....

#3 vic_man4

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Posted 29 June 2008 - 07:51 AM

View Posthammer, on Jun 28 2008, 10:22 PM, said:

guys can anybody tell me the EXACT inner barrel length of the KWA m4s tactical? Im planning to get a tightbore for my gun

You can always extend a bit into your flash hider if it is a bit longer, or you could buy on thats longer and cut it down to size. But Rockhound is correct in the lenght of the barrel. The length is stated on KWA's site (www.kwausa.com) Click there to get all the exact spec.s on your gun ;)

#4 karMeister

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Posted 29 June 2008 - 08:29 AM

Im using a Prom 6.03 407mm and have tried a KM TN 6.04 407

#5 hammer

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Posted 29 June 2008 - 08:41 AM

hmm... I might get the 407 and just cut it. any special notes on how not to damage the inner part of the barrel when im sawing it?

#6 karMeister

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Posted 29 June 2008 - 09:22 AM

View Posthammer, on Jun 29 2008, 08:41 AM, said:

hmm... I might get the 407 and just cut it. any special notes on how not to damage the inner part of the barrel when im sawing it?

Its not advisable to cut inner barrels but if you really want to a pipe cutter would be better than using a saw. Then dremel the inner part using a cone shaped grind stone to get the cone tip back

#7 vic_man4

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Posted 29 June 2008 - 02:06 PM

View Posthammer, on Jun 29 2008, 08:41 AM, said:

hmm... I might get the 407 and just cut it. any special notes on how not to damage the inner part of the barrel when im sawing it?

Yeah, if you do it wrong, you will get jamming, ALSO REMEMBER to cut the side that is at then very end of your gun (NOT the end that goes into your hopup) If you cut the wrong end, then.... it makes a nice $50 paper weight XD

Edited by vic_man4, 29 June 2008 - 02:06 PM.


#8 Guest_allizard_*

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Posted 29 June 2008 - 05:54 PM

View Postvic_man4, on Jun 29 2008, 03:06 PM, said:

Yeah, if you do it wrong, you will get jamming, ALSO REMEMBER to cut the side that is at then very end of your gun (NOT the end that goes into your hopup) If you cut the wrong end, then.... it makes a nice $50 paper weight XD

Too long for paper weight... maybe a good "high-grade" straw for your Big-gulp.   :lol:

#9 hammer

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Posted 30 June 2008 - 12:00 AM

I got the 407mm,, seems like I dont need to saw it hehe I like it longer than the outer barrel and its hidden under the flash hider anyway.

Is there a break in period for the prom barrel, I read somewhere like 4000thousand rounds?:P

#10 Guest_allizard_*

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Posted 30 June 2008 - 07:51 AM

View Posthammer, on Jun 30 2008, 01:00 AM, said:

I got the 407mm,, seems like I dont need to saw it hehe I like it longer than the outer barrel and its hidden under the flash hider anyway.

Is there a break in period for the prom barrel, I read somewhere like 4000thousand rounds?:P

DB have a 4000-5000 break in period and it's made out of brass.

Promy barrel is steel and a much harder material.  And I haven't heard there is a break in period for Promy.

#11 karMeister

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Posted 30 June 2008 - 08:28 AM

most people say proms need 10k

#12 Guest_allizard_*

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Posted 30 June 2008 - 11:51 PM

View PostkarMeister, on Jun 30 2008, 09:28 AM, said:

most people say proms need 10k

I'm not surprise at all.. after all it's harder material.

#13 hammer

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Posted 01 July 2008 - 12:19 AM

can you guys need to explain why the prometheus barrels need to be breaked in? I mean what can a plastic bb do to a hard barrel like the prom?

#14 brooklyn468

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Posted 01 July 2008 - 07:14 PM

View Posthammer, on Jul 1 2008, 03:19 AM, said:

can you guys need to explain why the prometheus barrels need to be breaked in? I mean what can a plastic bb do to a hard barrel like the prom?

Well obviously rocks are harder than solid water (ice), but rocks erode by water over time, so the same effect happens with bbs and metal barrels

#15 Guest_allizard_*

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Posted 01 July 2008 - 11:10 PM

It's what they call micro honing.  I'll copy a link on ASF.

http://www.airsoftfo...h...&p=17725952

#16 hammer

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Posted 02 July 2008 - 02:19 AM

thanks, btw guys I bought this Posted Image, and it fits well with my gun :) I will add this up the compatibility list for kwa m4's

Edited by hammer, 02 July 2008 - 02:21 AM.


#17 vic_man4

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Posted 02 July 2008 - 09:33 AM

View Postallizard, on Jul 2 2008, 12:10 AM, said:

It's what they call micro honing.  I'll copy a link on ASF.

http://www.airsoftfo...h...&p=17725952
THat was bery useful :lol: athough it is very long :S

#18 karMeister

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Posted 03 July 2008 - 12:45 PM

Will get my custom 6.02 395mm  Edgi barrel tom... will let you know how it goes

#19 hammer

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Posted 04 July 2008 - 12:36 AM

do update us :)

#20 karMeister

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Posted 08 July 2008 - 09:13 AM

View Posthammer, on Jul 4 2008, 12:36 AM, said:

do update us :)


I just got my custom EdGi 6.02. this morning.

Adjusted my eotech a bit...


50ft away/30ft  elevated...


is this zero enough?


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