ShareThis!!!


For anyone who's been following me here on the Pyramyd Airsoft Blog over the last several weeks, you've no doubt seen all the Airsoft action footage I've uploaded to the Pyramyd Airsoft YouTube Channel where either myself or my good friend, Trent F. Warren, were slaying tangos with the KWA M4 CQR MOD2 AEG.  This rifle is a great option for anyone who wants the high performance that KWA guns are known for, without having to go over budget to get one.  

The CQR MOD2 has been a great rifle, but I did notice that the FPS seemed a bit low for what it was rated for by the manufacturer.  FPS was a little more inconsistent that what I'd like to see in an AEG, so I decided to tear this thing down a bit and see about sealing up the hop-up assembly to see if that would help (it usually does). 

To do a proper evaluation of the results of your attempts to improve performance, it is essential to perform an accuracy and/or chrono test, whichever is applicable, prior to beginning your tuning procedures.  Luckily, I remembered to do this before I got started, which isn't always the case.  

Here are the chrono results before any improvements or upgrades were performed on the CQR, using Elite Force .20g BBs:
317
310
332
306
287
298
301
311
315
304
=/- average (standard deviation): 11.5 fps
Spread: 45 fps
Average FPS: 308.1

So, as you can see, it's a bit more inconsistent than I'd like.  

Detaching the upper from the lower was probably the trickiest part of this process.  Allow me to elaborate, my friends.  Look at the image directly below.  Do you see the back of that piston peaking out through the cutaway portion of the gearbox?  Well, that piston's back end was catching on a piece inside the upper receiver and make it a bit difficult to remove it without some force.  The motor is over-rotating since there is no MOSFET in there to apply active braking and it took a few times of pulling the trigger just right to get the piston to sit closer to battery than where it was originally.

how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
See, now piston is clear and it became a lot easier to detach and reattach the upper.  You CAN, however, do both with the piston locked back as pictured above, it just requires you to use a bit more force and you run of the risk of damaging the piston. 
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
So once I figured this out, the upper just popped right off (after removing the front & back body pins).
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
The thing to be careful of now is the wire harness that helps guide the wire from the inside of the receiver to the inside of the front handguard area.  For the purposes of this procedure, the need to horse around with this was not necessary, so I just laid the lower receiver & gearbox carefully to the side so that I could get to the hop-up assembly inside of the upper receiver. 
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Just like most other Airsoft AEGs out on the market, the inner barrel just pulls right out once you've got the gearbox out of the way. 
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Here, below, I have fully removed the inner barrel & hop-up assembly, as well as the clip that secures the hop-up to the inner barrel.
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Here is where you go get your roll of Teflon, of PTFE, tape.  You will need this to continue if you are using this as a guide while you work on your rifle at home. 
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Now, take the Teflon tape and wrap it 2-3 times over the end of the hop-up bucking, and then continue wrapping until you've wrapped the brass ring that helps keep the hop-up chamber in place.  Be careful not to pull your hop-up bucking out of place during this process.
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Next, gently and carefully, slip the hop-up chamber back over the bucking and brass ring on the inner barrel.  This should be a more snug fit than before (my inner barrel & bucking were able to move out of place & alignment quite easily beforehand).  Also note that I've reinstalled the hop-up chamber clip.
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Once you've got the hop-up assembly back together, it is extremely important to reset your bucking.  It is likely that it was moved out of place and off aligned while you were installing the hop-up chamber again.  You can do this easily by turning on the hop-up enough so that you can see the nubs hanging down into the barrel.  It is a lot easier to see them if you're looking down the barrel with a well-lit, light colored background to provide contrast against the nubs.  Once you can see the nubs hanging down, ever-so-slightly twist the inner barrel to one side or the other while holding the hop-up chamber steady with your other hand until, while looking straight down through the inside of the inner barrel, it appears that your nub is centered at the top of the barrel.  Use a point on the back of the hop-up chamber for reference as well. 
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
Once you've done that, just reinsert the inner barrel & hop-up assembly back into the outer barrel/upper receiver assembly.  Then put that whole unit back onto the lower receiver, pop the two body pins back in and you're in business (almost).
how to upgrade your airsoft aeg for free, how to increase fps in an airsoft aeg, kwa upgrade tutorials, how to take apart a kwa aeg, how to take apart an aeg, pyramyd airsoft blog, pyramyd air, pyramyd airsoft guns, tom harris media, tominator,
One must test the results of their work using a choronograph afterwords, to compare to the original performance date and see if there was any noticeable improvement or if this is just a huge waste of time.  Here are my after-improvements stats on the chrono, using .20g BBs from Elite Force.  

340
340
357
357
353
351
347
346
352
348
+/- average (standard deviation): 6 fps
Spread: 17 fps
Avg: 349.6 FPS <-------PERFECT!!!

Comparing the 2nd set of stats after this mod was completed to the 1st set, before anything was done to the gun, you'll notice a very nice improvement in performance across the board, especially in the average FPS category (almost a 50 FPS boost!!!).  And to think, the only thing that this cost me was the time to do it all, and a few pennies worth, if that, of Teflon tape.

I would like to point out that I did not invent this technique, nor do I pretend to be the foremost authority on upgrading Airsoft guns.  We can get caught up in the idea that we need to spend a bunch of money on upgrade parts to get a big boost in FPS, when sometimes all you need to do is spend a little time working with what you've got (Teflon tape).  Sure, there is plenty more that can be done to gain even more improvements in performance, but this technique should give you a great start.
-------------------------------------
AIRSOFT JOB OPPORTUNITY ALERT: Pyramyd Air is looking for enthusiastic individuals who have a good knowledge of Airsoft products to help them assist their customers while shopping at www.PyramydAir.com.  You'll get paid to talk about Airsoft stuff AND you can do it from the comforts of your own home!  Click the following link to register with Needle and get all the details.  https://pincushion.needle.com/needlers/register/pyramydair 
Elite Force Airsoft BBs, Airsoft ammo, What's in your mag?, airsoft bbs for sale, airsoft ammo for sale, bulk airsoft ammo, cheap airsoft bbs, cheap airsoft ammo, precision airsoft bbs, precision airsoft ammo, Pyramyd Air, Umarex, Pyramyd Airsoft Blog, Tom Harris Media, Tominator,
Elite Force Airsoft BBs on Sale!
Pyramyd Air
Pyramyd Airsoft Facebook Page, Big Shot of the Week, Win $50, Win Fifty Bucks, Pyramyd Airsoft Blog, Pyramyd Airsoft Youtube Channel, Tom Harris Media, Tominator, Airsoft Guns,
If you're done browsing here on the Pyramyd Airsoft Blog, would you mind sharing this blog with friends on Facebook? Perhaps even on your favorite Airsoft forum?

Speaking of Facebook, check out our new Facebook page for Pyramyd Airsoft and get in on a chance EVERY WEEK to WIN FIFTY BUCKS ($50) or check out our Pyramyd Airsoft YouTube Channel for a ton of great Airsoft video reviews, unboxing videos and actual Airsoft gun performance tests.
Pyramyd Airsoft Facebook Page, Pyramyd Airsoft Blog, Pyramyd Airsoft Youtube Channel, Tom Harris Media, Tominator, Airsoft Guns,
Pyramyd Airsoft Youtube Channel, Pyramyd Airsoft Facebook Page, Pyramyd Airsoft Blog, Tom Harris Media, Tominator, Airsoft Guns,

Recent Stuff from the Tominator