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Tightbore Barrel for CQR MOD 1


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#1 Chris562

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Posted 05 May 2014 - 08:10 AM

I have a CQR MOD 1 that has a Magic Box Teflon 3/4 Cylinder, ZCI poly ported head, and KWA M130 spring in it.  My FPS has settled down to about 370 with .28 bbs.  I play woodsball exclusively and have found that I am unable to reach out and touch someone.  My son has a G&G CM with the same length barrel and he is eating me up at distance (no mods).  I am considering a tightbore barrel (KM Head Precision Barrel 1950 series: KM4A1/KM4 RIS 6.02mm / 395mm) to try to increase my range and accuracy a bit more.  I am seeking advice on this matter.  Some other options would be putting a full cylinder in it or a longer barrel with a mock suppressor to cover the difference but I don't want my rifle too long as I like the length now.  Any thoughts would be appreciated.

Edited by Chris562, 05 May 2014 - 08:12 AM.


#2 uriahskates

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Posted 05 May 2014 - 03:41 PM

I have that exact barrel in my SR7 and it is a beast. I can reach people from 200+ feet. Also, it will add 25 FPS so be wary of that. My SR7 shoots 420 with .25's with that barrel but with my stock barrel it dropped down to 395 with .25's.

Edited by uriahskates, 05 May 2014 - 03:43 PM.


#3 Pyro_Buster

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Posted 05 May 2014 - 03:57 PM

I have an SR10 that I swapped barrels in. I changed to a Madbull 6.03. Most of the guys here like it a lot, and while I haven't had a lot of opportunity to really push it, I'd have to agree. The price was really the big selling point for me, as it's nearly 1/2 the price. And from what I gather, the KM head is coated with something (I forget what) that's not good at all and wears down fast. Additionally, I didn't notice a massive FPS increase from the stock to the 6.03.

#4 Chris562

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Posted 05 May 2014 - 03:58 PM

Uriahskates:

Thanks for the reply.  Do you think .25s are better to use instead of the .28s then?  I was going with the weight to get through the brush and these breezes we have on our field.  It sits on a hilltop so the breezes come through there pretty well.

#5 Chris562

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Posted 05 May 2014 - 04:00 PM

View PostPyro_Buster, on 05 May 2014 - 03:57 PM, said:

I have an SR10 that I swapped barrels in. I changed to a Madbull 6.03. Most of the guys here like it a lot, and while I haven't had a lot of opportunity to really push it, I'd have to agree. The price was really the big selling point for me, as it's nearly 1/2 the price. And from what I gather, the KM head is coated with something (I forget what) that's not good at all and wears down fast. Additionally, I didn't notice a massive FPS increase from the stock to the 6.03.

Where can I find the Madbull in a 395mm barrel?  I have been having a hard time finding that length.

#6 uriahskates

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Posted 05 May 2014 - 04:20 PM

View PostChris562, on 05 May 2014 - 03:58 PM, said:

Do you think .25s are better to use instead of the .28s then?

In my experience, .25's have been my happy medium. They're pretty resistant when going against winds and they travel almost as fast as a .20 bb.

View PostPyro_Buster, on 05 May 2014 - 03:57 PM, said:

And from what I gather, the KM head is coated with something (I forget what) that's not good at all and wears down fast.

It is coated with nickel teflon. Teflon makes the barrel slick while nickel makes it tough and resistant to corrosion. In my standpoint, it is very good. Also, I cleaned my barrel yesterday and the inside of the barrel is the same unscathed condition as it was when it came to my doorstep brand new.

Edited by uriahskates, 05 May 2014 - 04:26 PM.


#7 Pyro_Buster

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Posted 05 May 2014 - 08:18 PM

View Posturiahskates, on 05 May 2014 - 04:20 PM, said:

It is coated with nickel teflon. Teflon makes the barrel slick while nickel makes it tough and resistant to corrosion. In my standpoint, it is very good. Also, I cleaned my barrel yesterday and the inside of the barrel is the same unscathed condition as it was when it came to my doorstep brand new.

I'm not disputing anything. I was just reading on airsoft sniper forum (I think that was the one) and a whole bunch of people were having problems. I don't have any personal experience, but that's just what I've heard. And I apologise for any misinformation I may have provided.

I don't think they sell 395. You might have to get 455 and cut it down if you go that path. Someone on these forums has had a lot of luck with a pipe cutter for that.

As for BB's, I personally use .30's whenever I can. They hold on to their energy longer. Gamepod (my local field) has a .25 limit. But in the woods I use .30's.

Edited by Pyro_Buster, 05 May 2014 - 10:16 PM.


#8 Larry

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Posted 06 May 2014 - 07:13 AM

Evike has 363, and 407mm madbull barrels, suggest the 6.03. I use .28s in a SR10 (shoots 400fps with .20s) with  a madbull 455mm/6.03, with a G&G green flathop setup it gets way out there. The 407mm is only 1/2 inch longer than a 395mm. Last I tried my son was hitting me at 240ft aiming slightly over my head.

#9 tales

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Posted 06 May 2014 - 11:55 AM

KM Head is a great barrel. I used both and it does outperform the MadBull, There are many here that prefer the KM over the MB
For "Budget barrels" I use 6.02s  And like raptor's before a MadBull, JMO.

It might not be a barrel problem

Edited by tales, 06 May 2014 - 12:04 PM.


#10 uriahskates

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Posted 06 May 2014 - 09:53 PM

View PostPyro_Buster, on 05 May 2014 - 08:18 PM, said:

I'm not disputing anything. I was just reading on airsoft sniper forum (I think that was the one) and a whole bunch of people were having problems. I don't have any personal experience, but that's just what I've heard. And I apologise for any misinformation I may have provided.

No harm intended lol :P

#11 Chris562

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Posted 07 May 2014 - 07:38 AM

Thanks for all the input.  So if I were to get agood deal on a 6.03 407mm madbull for $40 shipped, that would be a good improvement over the stock barrel?  Or is there a big difference between the 6.02 and 6.03?

#12 Larry

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Posted 08 May 2014 - 07:19 AM

My stock KWA barrel works great (flat hoped). Wanted to play with the r-hop with out messing with my orignal set up, bought the Madbull 6.03 and xtra hop up assy for a quick swap out assy.  Dont own any 6.02s cant comment on that.

Edited by Larry, 08 May 2014 - 10:58 AM.


#13 uriahskates

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Posted 08 May 2014 - 06:36 PM

View PostLarry, on 08 May 2014 - 07:19 AM, said:

My stock KWA barrel works great (flat hoped).

What buckings did you use?

#14 Larry

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Posted 09 May 2014 - 04:16 AM

View Posturiahskates, on 08 May 2014 - 06:36 PM, said:

What buckings did you use?
I have a shaved G&G green in my orig KWA barrel with a eraser nub. Shaved the 2gx bucking for my new madbull 455mm/6.03, using some soft silicone tube for the patch and a prommy bridge tensioner for nub. Pic is of my orig set up, dont have a pick of my r-hop yet.


Posted Image

Edited by Larry, 09 May 2014 - 04:24 AM.


#15 BLATEY

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Posted 09 May 2014 - 04:45 AM

A little off topic but what do you reccomend, flat hop or r hop for a DMR setup. I'm planning on attempting whatever is better in a CYMA SVD I'm planning on buying sometime in the next month or so.

#16 Larry

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Posted 09 May 2014 - 05:10 AM

View PostBLATEY, on 09 May 2014 - 04:45 AM, said:

A little off topic but what do you reccomend, flat hop or r hop for a DMR setup. I'm planning on attempting whatever is better in a CYMA SVD I'm planning on buying sometime in the next month or so.
  Dont have a gun that shoots over 400fps cant comment, Vanevery has posts on that subject, flat hop is much easier than  a
r-hop.

#17 BLATEY

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Posted 09 May 2014 - 06:14 AM

Ok, thanks. What your range then with the r hop, also fps of that gun?

#18 Larry

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Posted 09 May 2014 - 06:39 AM

400/410fps, son has hit me with it at 240ft aiming a little over my head several times with 3 round bursts. We have a large pond that we use for a range at the feild I play (Georgetown ATL), not seeing anyone with guns shooting 400 fps splashing bbs any further than me. Even the Pstars.
  Tape mesure was used for the 240ft. I use a magnified scope so normally I pick a out a knot on a tree a ways away and check accuracy that way. Always some wind where we play hot one day cold the next so mesuring, setting up a system to lock the gun down, not really for me. Maybe later in the year when I try making a DMR.

Edited by Larry, 09 May 2014 - 07:30 AM.


#19 BLATEY

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Posted 09 May 2014 - 10:34 AM

Ok, thanks.

#20 gcw360

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Posted 10 May 2014 - 06:47 AM

View PostPyro_Buster, on 05 May 2014 - 03:57 PM, said:

I have an SR10 that I swapped barrels in. I changed to a Madbull 6.03. Most of the guys here like it a lot, and while I haven't had a lot of opportunity to really push it, I'd have to agree. The price was really the big selling point for me, as it's nearly 1/2 the price. And from what I gather, the KM head is coated with something (I forget what) that's not good at all and wears down fast. Additionally, I didn't notice a massive FPS increase from the stock to the 6.03.
Regarding barrel coatings.  Some use a coating of Teflon which can peel or wear.  I have seen several barrels do this overtime though it's been a while since I have seen or heard a report of this.  The coating on the KM head barrel is Nickel/Teflon or Nickel PTFE. It's quite literally nickel and Teflon that is plated to the barrel.  This creates a very slick and durable finish that, for me anyway, has outperformed any other barrel to date in my system. In time, any surface will wear and breakdown but so far I have had no appreciable wear in The KM Head I have installed in my test gun.

Now, I will tell you I was a skeptic at first.  And if there are Forums reporting issues with KM Head barrels I would like to review them so it can be watched by KWA.




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