39 replies to this topic

[SPANKYDAHAMSTR]

 LoneRegister, on 23 June 2012 - 08:42 PM, said:

Hi Guys - I went out and picked up 2 of the CQR's for my son and myself.  What a delightfully sized gun for indoor airsofting.

However a few notes.  I ran the gun with 1100mah 15C 11.1V Lipo  My son ran his gun quite successfully with zero problems, but I am not sure he fired as much as I did.  I played for perhaps 6 hours, and shot perhaps 600 rounds per hour.  I did notice that my gun had a few feeding issues where it would "stuff" the barrel with bbs.  The tone of the gun would change, and I would then have to pull the mag out, turn it upside down, and rightside up while firing.  It would then "cough" up a bunch of stuck bbs - and then I could fire just fine.

This happened perhaps 4-5 times - and I am not sure why.

this happened with the new mag that comes with the gun.  And then also with a high cap that came with my other KWA guns.  It also happened with some classic army plastic mags.

Other than that, the gun was a workhorse, played for 6 hours - and didn't have any other problems that this.

I also had this issue with my new CQR and Mid-Cap on monday night, indoor field. I had lots, lots of feeding issues. My friend was using this gun with some cheap BB's from Evike I thought it had to be the BB's so I swapped them out for KSC .30's and I still had some issues. Now that I've gotten it home I cleaned it and haven't yet had the chance to test it again. I will update with KSC and cleaned gun!!

[superfrog]

It could be the feeding ramp. Adjust it.  Also could be the hop up on to much.

It could also be yhat those bbs are shy or bashful.  They may be protesting their use to hit people. LOL

Edited by superfrog, 27 June 2012 - 05:37 PM.

[gcw360]

 superfrog, on 27 June 2012 - 05:36 PM, said:

It could be the feeding ramp. Adjust it.  Also could be the hop up on to much.

It could also be yhat those bbs are shy or bashful.  They may be protesting their use to hit people. LOL

SF makes valid points. Any mods to the gun?  Internal or external?

[niko_gpsy]

And I would try cleanIng the barrel, bucking and hop up while it's disassembled. Then take care to reassemble it correctly.
There is a video guide on DIY section on this forum on how to properly clean the barrel and bucking.

[superfrog]

So with that being said, if we want to drop fps in a Sr7 with a madbull sp110 back down to cqb fps we should change to these cylinders to stop the overcycling issue with 11.1 lipos?  
Would it make since to put a 120 spring and this cylinder stock in Sr7 from this point on?   That sure woildmake using lipos a lot easier.  I had to put this madbull spring in to use my batteries.  I'll send my gun in to be a guinea pig is you want a test platform.

[karl_azytzeen]

 Allizard, on 27 June 2012 - 06:00 PM, said:

Before I explain why the CQR only ported the cylinder.  Let me explain ported piston head.

The traditional Ported piston head to achieve maximum output doesn't APPLY on KWA gearbox design.  In fact, with the right diameter it doesn't need to have a ported piston head.  We've done test over test and painfully recorded FPS 400 rounds with ported and 400 rounds non ported piston head and put it on a chart.  On average... there is NO significant FPS improvement on our non-ported piston head.  It's NOT necessary on our gearbox.  The reason to have a ported piston is really not about full compression.  It's to lessen the resistance when gear pulling the piston to the rear position.  That's the REAL reason for ported piston head.  

As for why we are using ported cylinder vs. adjust the spring for lower FPS. Again, that's the traditional thinking of lowering FPS.  However, the formular change when combining with Lipo battery.  As you know the 2GX is build on a torque up gear ratios pair with a torque motor.  To lower FPS, swapping out the to weaker spring to lower FPS will cause timing issue with Lipo battery because the tappet plate isn't opening long enough for full compression.  This seems to be the issue we have seen with early G36c and SR7.  A quick fix can remove the sector clip but it's not a true remedy and will still have feeding issue when using a strong full charged lipo battery.  

The proper way to adjust is to change the gear ratios and lower the motor speed to compensate the timing with lipo battery.  However that actually cost more money for us to retool with new gears and new motor.  Therefore the fastest way to produce gun without retooling is open up the cylinder.   2GX is optimize to run at 400 FPS so there is no need to change anything else.  Stress is NOT a factor at all because 2GX can run with 500+ FPS setup.  It still can maintain the same ROF on Lipo with 400 FPS spring but only shooting at 350 FPS.  This also makes upgrading back to 400 FPS easy.  Just change the cylinder.  

Like I said... everything we do have a reason. Sometimes is very unconventional... Then again, KWA is NOT a known as conventional company.

Thank you very much Allizard, a very interesting info.... and yes... it has less manufacture cost and upgrade to 400 again is much more easy... I dont had thinked on that.

[airsoftmatthias]

I just received my CQR MOD2 and... meh. I own a KM4-RIS and my brother owns the regular KM4 and we both love them. I am always amazed by the build quality of KWAs. Every time I pick one up, I am blown away by how solid feeling they are. I would have no qualms wacking my KWA against a brick wall. I wouldn't appreciate the dents and scratches, but I know that the gun will take that type of abuse. The polymer body on the CQR feels very flimsy compared to the metal KWA bodies. Obviously it is lighter and more fragile, and I am sure it will take a bit of abuse, but it doesn't have the solid feel that I'm used to.

[niko_gpsy]

It would be obvious at this point that there will be a huge reduction in weight, relatively speaking, with the new CQR's compared to that of the CQB models.  It may feel "flimsy" just by the difference in weight but the polymer body is in no way as weak as you think.
Mine is on order which I will convert to a 30-40rps cqb gun.  I am usually brutal on my CQB rifles (not so much for outdoor, lol) so I will put this polymer body to the test.  I will definitely let you know the results.

[superfrog]

I am not a fan of the way it feels.  It's git to be great internally, but someone else said they felt a bit cheap and I must confess I agree.  Time will yell though.  I really like g&g polymer bodies and hopefully these will hold up as well. I might look into one ina year or so.  Let the torture tests begin.

[SPANKYDAHAMSTR]

 gcw360, on 27 June 2012 - 05:45 PM, said:

SF makes valid points. Any mods to the gun?  Internal or external?

 niko_gpsy, on 27 June 2012 - 05:53 PM, said:

And I would try cleanIng the barrel, bucking and hop up while it's disassembled. Then take care to reassemble it correctly.
There is a video guide on DIY section on this forum on how to properly clean the barrel and bucking.

I followed the 2 part hop up and barrel cleaning guide to the T. When finished, I was confident that all my problems were behind me!!!

Not so much, I loaded the mag clipped in, and the first BB on semi rolled out...

Sad day,

However, after 3-5 days without toughing the dam thing I decided to try again. I am quite mechanically savvy as I have an Aerospace degree. Needless to say I felt pretty defeated. I disassembled this thing down to the last screw. I then re-fit it to my liking and tried again same result. I then noticed that the hand guard was not quite right. I then refit the battery and tada!!! Flawless performance. I dont know why or how this could be related at all to the feeding issue but I don't care.

Upon closer inspection it seemed that the battery fitment may have been enough stress on the outer barrel to ever so slighly impare its alignment but I still think this was luck. Also the mag spring was so strong that when fully loaded I was unable to get good feeding until about 28 BB had been removed I tried with half loaded Mag and Flawless. I decided to stuff the mag all the way and leave it sit for a day or too and then try again.

[ashtonn27]

 Allizard, on 27 June 2012 - 06:00 PM, said:

Before I explain why the CQR only ported the cylinder.  Let me explain ported piston head.

The traditional Ported piston head to achieve maximum output doesn't APPLY on KWA gearbox design.  In fact, with the right diameter it doesn't need to have a ported piston head.  We've done test over test and painfully recorded FPS 400 rounds with ported and 400 rounds non ported piston head and put it on a chart.  On average... there is NO significant FPS improvement on our non-ported piston head.  It's NOT necessary on our gearbox.  The reason to have a ported piston is really not about full compression.  It's to lessen the resistance when gear pulling the piston to the rear position.  That's the REAL reason for ported piston head.  

As for why we are using ported cylinder vs. adjust the spring for lower FPS. Again, that's the traditional thinking of lowering FPS.  However, the formular change when combining with Lipo battery.  As you know the 2GX is build on a torque up gear ratios pair with a torque motor.  To lower FPS, swapping out the to weaker spring to lower FPS will cause timing issue with Lipo battery because the tappet plate isn't opening long enough for full compression.  This seems to be the issue we have seen with early G36c and SR7.  A quick fix can remove the sector clip but it's not a true remedy and will still have feeding issue when using a strong full charged lipo battery.  

The proper way to adjust is to change the gear ratios and lower the motor speed to compensate the timing with lipo battery.  However that actually cost more money for us to retool with new gears and new motor.  Therefore the fastest way to produce gun without retooling is open up the cylinder.   2GX is optimize to run at 400 FPS so there is no need to change anything else.  Stress is NOT a factor at all because 2GX can run with 500+ FPS setup.  It still can maintain the same ROF on Lipo with 400 FPS spring but only shooting at 350 FPS.  This also makes upgrading back to 400 FPS easy.  Just change the cylinder.  

Like I said... everything we do have a reason. Sometimes is very unconventional... Then again, KWA is NOT a known as conventional company.

SO to get my aeg shooting around 400 fps all I need to do is flip the cylinder around so that the port is facing the rear or do I need a whole new cylinder?

[Furluge]

 Allizard, on 08 July 2012 - 09:44 PM, said:

Replace it with a type 1 or type .5 cylinder in our Proshop.

Any chance you could link directly to the cyldiners you're taking about? I believe I found what looks like a type 1 but it's not marked as such. Couldn't find a .5 cylinder but I did find a type 0 there.

Edited by Furluge, 09 July 2012 - 01:52 AM.

[superfrog]

You need the cylinder from an Sr10/12/ris.  Look at their parts list and just order it from there.

[AirsoftCA]

 SPANKYDAHAMSTR, on 27 June 2012 - 03:14 PM, said:

I also had this issue with my new CQR and Mid-Cap on monday night, indoor field. I had lots, lots of feeding issues. My friend was using this gun with some cheap BB's from Evike I thought it had to be the BB's so I swapped them out for KSC .30's and I still had some issues. Now that I've gotten it home I cleaned it and haven't yet had the chance to test it again. I will update with KSC and cleaned gun!!

the cqr is made to shoot .20 bbs not .30 as it said on the box ,when I use .20 in my cqr I experienced one misfeed the heavier bbs will make it jam , try the KSC .20

[musicianairsofter]

I'd like to dive with a CQR and see if it cracks.
I'm a big disbeliever in plastic bodies...

[superfrog]

 AirsoftCA, on 16 July 2012 - 06:52 AM, said:

the cqr is made to shoot .20 bbs not .30 as it said on the box ,when I use .20 in my cqr I experienced one misfeed the heavier bbs will make it jam , try the KSC .20

Well, that's not entirely true.  .2 is the minimum bbs to shoot and sur to the low fps .2s move faster in a tights area which is good.  But,  to say its not made to shoot .3s, is saying that .3s are different in size. Hares the logic, a .2 bb is the same size as a .3, but their mass is different.  The weight of a bb will not cause jamming issues.  As a matter of fact we just changed the cylinder in a cqr and are running .3 bioshots. It feeds flawlessly.  Interestingly enough ne kwa 120 plastic mags feed bioshot .3 in my Sr7 but same mag same bb will not feed in my find socom gear.  But change to elite force .28 and they feed perfectly in both.  Also .32 bioshots feed perfectly I'm both guns in same mag.  

That to say some guns are finiky.

[superfrog]

 musicianairsofter, on 16 July 2012 - 02:26 PM, said:

I'd like to dive with a CQR and see if it cracks.
I'm a big disbeliever in plastic bodies...

Honestly I was also until we got g&g cm and now my sons socom gear (g&g body) and we have not been make to break them jb falls or drops or dives.  If these kwa bodies are like those then they are super tough.  I'm not saying they will not break or crack, but metal bodies have cracked also.   Time will tell though.  these are light and seem to be easy to make transitions with in tight situations.

[niko_gpsy]

 musicianairsofter, on 16 July 2012 - 02:26 PM, said:

I'd like to dive with a CQR and see if it cracks.
I'm a big disbeliever in plastic bodies...

Actually you can dive with a all metal receiver and it can still crack.
Diving + Airsoft gun = broken gun