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KWA CQR MOD 2 Proper or Inproper upgrades


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#1 DesFox24

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Posted 27 August 2013 - 03:42 PM

Hi Folks. This is my first post on these forums and I've learned a lot reading others posts and responses to questions. I know there are many other posts similar to my own but I just wanted a more direct answer regarding my question. So my question is, are these upgrades decent or is there something that can be changed out? Over time will this be a bad choice or a good choice? I basically took my cqr mod 2 and did some upgrading.  Put in a madbull m120 spring, Lonex Polycarbonate piston head, Lonex extreme toughness polycarbonate piston w/ ten metal teeth, bravo aluminum cylinder head with double o-ring, switched the cylinder to a kwa cylinder that's used in the km4a1 and put in a madbull 6.03tbb 363mm. With .25s my fps is consistent on every shot at 389/390. The motor and gears are the stock 2gx as well as my hop up. All suggestions and thoughts are most welcome. Thanks in advance =)

#2 vanevery

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Posted 29 August 2013 - 06:36 PM

You really did a good job.

As for your parts:
- madbull m120 spring. Yes.

- Lonex Polycarbonate piston head. Yes.

- kwa cylinder / km4a1. Yes.

- Gears: Stock. Yes.

- Hop-up Unit: Stock. Yes.

- Motor: Stock. Yes. I like KWA motors for they have been very good performers for me, especially for ferro-magnetic motors. There are some really great after-market motors that have higher torque and Neo Magnets and will yield better performance.
Get the most out of your stock motor first. Know what it can actually do before upgrading.

- MadBull 6.03tbb /  363mm. Yes. Great Inner Barrel, however.......
A stock KWA 395mm Inner Barrel will out perform this one with the MadBull m120 Spring and KWA stock Cylinder you installed.

- Bravo aluminum cylinder head with double o-ring. Yes, and no.
I have this Cylinder Head and really like it. The fact is, I get better performance with my stock KWA Cylinder Heads vs this one in my KWA Guns.

- Lonex extreme toughness polycarbonate piston w/ ten metal teeth. No.
These are hit or miss as to whether or not the Piston teeth will mesh with KWA Sector Gear teeth.
Even if they do, this piston is heavier than you need for your set-up. No reason to lose ROF for an m120 Spring.
A Lonex Blue is a great choice, for future reference.


Performance:
Make sure to address the Hop-up in terms of performance.
Flat-hop and R-hop are always great mods to do.
For Drop-in Buckings:
Lonex 70 Degree
G&G Green
Prommy Purple
will all serve you well.

Also:
I may suggest using quality .30 bb's as the mainstay of your ammo.
Your gun is now built to be a field weapon vs the CQB weapon it was in stock form.
You will simply shoot farther and more accurate vs using the .25's.

#3 DesFox24

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Posted 30 August 2013 - 11:00 AM

Thank you for the reply Vanevery.

After a few hundard rounds. I went back inside my box and had to adjust the AoE slightly. It is meshing very well now. While purchasing my barrel I wasn't able to find a Lonex 70 degree. Which from reading these forums seems to be the choice of buckings. That is next on the list to add once they come back in stock.

I did notice though that my cqr stock inner barrel, while being shorter, was actually performing better. All shots were dropping in the same spot with very little to no flyers. With the madbull I was gaining roughly about 10ft extra but every few shots would be a flyer. I know I have many more rounds through my brass barrel making it much more smoother, I'm hoping that's the case with the madbull.

I'll most definately look into the lonex blue piston as well as using .3's this upcoming weekend.

Cheers

#4 vanevery

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Posted 30 August 2013 - 06:08 PM

Inner Barrel Clarificatrion:

KWA Mod 2 stock inner barrel:  273mm
After-market barrel purchased:  363mm
KWA KM4 stock inner barrel:    395mm

The barrel I am suggesting is the KM4 / 395mm inner barrel.
http://store.kwausa....1gearbox-1.aspx

Edited by vanevery, 30 August 2013 - 06:08 PM.


#5 EzDeezer

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Posted 30 August 2013 - 07:46 PM

Just coming in to ask as to why a stock KM4 barrel would outperform a madbull one?  I can see a stock SR series barrel doing that, but not a stock KM4 barrel.

#6 Chuck S

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Posted 31 August 2013 - 03:43 AM

Ideal BB weight takes some experimentation in my experience.

My high power LM4 thrives on 0.32g Elite Force Milsim biodegradable BBs.  My LM4 sends these out of the barrel at nearly 400fps and they carry far.  Additionally their dark brown color drastically curtails the tracer effect of white BBs forcing me to use the sights.  My KM4-CQB with the short barrel seems to like 0.28g Elite force best.  Heavier BBs tend to be stable for longer distances but lighter BBs get there faster.  Still playing with BB weight for my new RM4.  I'm hoping she likes 0.28g or 0.32g so I don't need to stock and keep track of another (like 0.30g)!  I've tried 0.30g in the KM4-CQB but with the short barrel and small cylinder/spring they just seem too slow.  I've had "upgrades" planned for the CQB for the past year (and all the parts) but she's been working too well to mess with the internals.

I've restricted my BBs to biodegradable.  I've sent thousands "down range" in my backyard and rarely notice any.  Scaled 9" steel silhouette targets at 100' are meat on the table for KWA guns.

-- Chuck

#7 gcw360

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Posted 31 August 2013 - 04:00 AM

View PostChuck S, on 31 August 2013 - 03:43 AM, said:

Ideal BB weight takes some experimentation in my experience.

My high power LM4 thrives on 0.32g Elite Force Milsim biodegradable BBs.  My LM4 sends these out of the barrel at nearly 400fps and they carry far.  Additionally their dark brown color drastically curtails the tracer effect of white BBs forcing me to use the sights.  My KM4-CQB with the short barrel seems to like 0.28g Elite force best.  Heavier BBs tend to be stable for longer distances but lighter BBs get there faster.  Still playing with BB weight for my new RM4.  I'm hoping she likes 0.28g or 0.32g so I don't need to stock and keep track of another (like 0.30g)!  I've tried 0.30g in the KM4-CQB but with the short barrel and small cylinder/spring they just seem too slow.  I've had "upgrades" planned for the CQB for the past year (and all the parts) but she's been working too well to mess with the internals.

I've restricted my BBs to biodegradable.  I've sent thousands "down range" in my backyard and rarely notice any.  Scaled 9" steel silhouette targets at 100' are meat on the table for KWA guns.

-- Chuck
(Off Topic)I'd like to hear your impression of the .28 vs .32 in the RM4.  I'm using KWA .3's with my RM4 and the thing is AMAZINGLY accurate out of the box.  So much so I may not do anything at all to it other than minor, and I do mean minor, cosmetic/functional changes. I will be doing comparison testing between my beastly KM4, an almost stock RIS (EdGI TBB upgrade), and the stock RM4 this weekend.  There may be a surprise or two in the  results.

#8 vanevery

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Posted 31 August 2013 - 06:55 AM

View PostEzDeezer, on 30 August 2013 - 07:46 PM, said:

Just coming in to ask as to why a stock KM4 barrel would outperform a madbull one?  I can see a stock SR series barrel doing that, but not a stock KM4 barrel.
This has to do with matching systems.
The OP changed the Cylinder from the stock CQB to the Type1 (.5) Cylinder that is used in the KM4 and M16 series guns. If the OP had kept the stock CQB Cylinder, then I would in fact suggest using the MadBull 363mm inner barrel.

The 395mm stock KWA inner barrel is a full inch longer than the MadBull 363mm.
This pairs better with the air volume the new Cylinder produces.
I also have used both barrels extensively in my KWA guns.

#9 EzDeezer

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Posted 31 August 2013 - 09:18 AM

Thanks for the clarification, I had an idea that this was why, but I misread you and thought that you meant a stock KWA barrel was of higher quality than a Madbull barrel, something that I find might be true with SR series barrels but not regular KM4 series barrels.




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