wdahm519
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Posts posted by wdahm519
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That reminds me.... Post your serial number!! Who can get the lowest!?!
I'm #000075
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I haven't suffered from any sort of band breakage or cracking yet, and I've been using my KJ in cold weather. I can't really attest to breakage of the band from normal wear and tear because I frankly haven't put *thaaaat* many rounds through it.
I could say fairly easy that my KJ has seen 1000-2000 rounds, and the band has held up fine.
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I dont have any hop issues. I can overhop a .28 easily. My gun is a serial numbered gun. I wonder if the guns having the issue are serialized or not.
Same. But they didn't change the design... so why would it be different?
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I figured I'd post another in-game performance update for the KJ in cold weather:
My KJW had great performance today in the cold again. It was right around freezing today, and my KJ suffered no problems at all. I went through about 5 mags in total (it only takes one to get him out guys!) and the bolt locked back every time, pretty consistent FPS with t_hum's velocity adjuster and o-ring piston (dialed in at 400), and no jams at all!
I'm really glad this gun performance is so superior in even in the winter, as up here in Michigan, it can get quite cold for a pretty long period of time (late November to early April).
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That's looking sweet !
Makes me want to get an eotech sight. Is it a real one?Yup, everything is real steel except my TD foregrip. Funny thing is those $15 replica QD TD grips work just as well as the their $80 realsteel counterparts. I use them on my AR15 as well.
I'm glad you like it!
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Sounds like your hop up is just mis-seated. As you probably well know, the barrel acts as the hop up chamber, and there is not separate chamber other than that. Take out your outer barrel and inspect that hop up unit. Heat shrink tube it, and make sure you put it back properly. If you have any problems post back.
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I thought I'd share my latest build with you all:
Kit list:
- KJW M4 Gas Blowback Rifle
- Daniel Defense Omega X 12.0 FSP Rail
- Magpul MOE Stock
- Magpul MBUS Rear BUIS
- PRI Combat Big Latch
- Magpul MIAD Full Kit
- Replica Tangodown QD VFG
- EOTech 511.A65/1
- Magpul XTM Rail Covers (FG, FDE, OD)
- Daniel Defense Ladder Covers (Black)
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Anybody have any tips on places KJ mags in currently in stock? I need at least 2 more.
I'll post up if I find any in stock.
Airsplat
has them... -
Quick question guys:
Has anyone had any experience with this mag pouch:
http://www.ebairsoft.com/tmc-mag-556-qd-ma...rg--p-2361.html
I'd like to know if it will fit the fat thermold-type KJW mags.
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No AEG uppers will not work with the KJW GBBR.
The upper lacks the take down pin block (the pin block you need in the back to lock the upper down to the lower at the rear), also the KJW has a proprietary attachment point for the hop up assembly in the front of the upper. The BCG assembly will slam into the lower portion of the front attachment point (Where the outer barrel is fastened to the upper by the barrel but) of the upper. So there is no possible way for an AEG upper to work on the KJW platform.
@wdahm519
The threading for the buffer tube resides on the lower receiver assembly,,,
Oh man, I must have totally misread that post then. My bad!
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no definitely was AEG uppers, possibly in the news thread that was revived earlier hmm
AEG Uppers don't have the threading for the brass buffer, so no. Also, I don't think KJW's upper has the same threads as a normal buffer tube, I think it has a smaller diameter, so I can't see this working out.
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Ive been meaning to do a mag update for a while.
They are still under development. We came across a few great ideas along the way and so we are doing some redesign to accomodate those innovations. I dont have a release date in mind at this point. There are just too many variables to consider and I don't want people to delay in making full use of their rifles.
So Id say go ahead and buy those mags.
The website and new videos and all that stuff is being worked on. I do all of that stuff myself as well as prototyping new ideas and fabricating most of what is made for sale. Add in my "real" job, a double major, and family and I get strapped for time ocassionaly. This month has been one of those times.
I really appreciate all the support you guys give. Thanks.
You can keep telling me not to wait as many times as you want Travis, I'm still waiting
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It is heat shrink tubing used in electronic/electrical work. I cut about 5mm in length and inserted it on to the arm and shrunk it with a lighter. I'll try to post pics tonight.
Ah that makes sense.
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To those whose hop up is not responsive, try adding a layer or two of heat shrink tubing to the lever that pushes against the hopup rubber. In my case, two layers reduced the arm's side by side 'wobble' and I can visually confirm that the hopup is working as it should be.
Did you just lay the pieces in there or did you attach them with an adhesive?
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Parts list please.
Also, are you using the original outer barrel?
Thanks
Parts list for that rifle looks like the following:
- Magpul MOE Stock in FDE
- Magpul MOE grip in FDE
- Magpul MOE/non-MOE (can't tell) trigger guard
- Replica/Real DD RISII 9.5" in Tan/FDE
- Magpul AFG in FDE
- Magpul MBUS front/rear in FDE
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Thanks Kai.
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Merry X-mas KJW M4 lovers!
Some of my KJ M4 in action (but not in game.. hence no goggles!)
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Just the black spacer it will still shoots around 390 fps I tried mine. Maybe add another spacer to lower it down.
And at what temp is that? It should hit somewhere between 400 and 410 with just the black o-ring at 75 degrees.
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A wrap and loop of 550 Cord works pretty well too if people don't want to deal with buying a sling plate. That's what I end up using, because I refuse to spend $40 on a small piece of metal again.
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Remember this is temperature Dependant, so as the weather changes you will need to add or decrease the amount of spacers for your desired FPS.
If you're only using the O-ring itself and no spacers, that should be about 400fps at 70 degrees. At about 55 degrees it should be around 380-385. Other than that, you'll have to find out for yourself in your climate.
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I would second that. Just get the new mag springs and you should be good. If it ends up not being the mag springs, then I would inspect the hop up unit for any damage, and also the air nozzle assembly, and your bolt carrier for any foul play areas just in case (though that could hardly be related to the problem).
The nice thing is there are hardly any parts in there so when something goes wrong its easy to source the problem.
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Hoping I can buy a used one. I don't care if it is used... lol or even broken in the areas that do break I want one! I'll get the replacement parts from T_hum and it'll be all good.
Unfortunately, because this is so new, it would be hard to find one used. Also, everyone loves their KJ M4, who would sell it!?
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*Nevermind*
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Alright guys, here is a review I have done via request of t_hum for the FPS Adjuster and O-Ring Piston that he has produced. Both of these products are available on the Cradle Airsoft webpage (www.cradleairsoft.com). I am not affiliated in any way with Cradle Airsoft, and these reviews come to you as a consumer, and unbiased.
"First Impression"
Werner Dahm.
Receiving
Upon receiving the package there was a small rip in my O-ring Piston packaging bag. I do appreciate the zip-locks on the bags, as they are nice to have. One staple seemed to hold the label to the bag well enough, and I didn’t think it would rip during shipping. Other than the rip in the bag, the packaging was a good thickness, much thicker than most you see. Very nice, professional "Cradle" logo and label.
9.5/10
Opening
Both the FPS adjuster and the O-Ring Piston feel solid. There are no metal burrs of any kind on the metal, which exemplifies the quality of the machining done to these parts. There were also no rips, tears, or excess rubber on any of the o-rings or spacers. This indicates quality parts as well. All the parts are symmetric and circular where they are meant to be, and everything slides on or off as it should.
10/10
Installing the Piston
No instructions were included, and perhaps that would be a good idea in the future (EDIT: Instructions are now listed on the webpage at www.cradleairsoft.com), especially for the less technically/mechanically inclined consumer. The piston threaded on successful and securely. Threads felt as though they were machined properly, and they did not appear to want to strip at all. I am using the factory Loctite that was already on the hex screw. I will test how long that is going to hold up. I have applied 2-3 drops of 20wt Blue bottle Silicon Shock Fluid used to lubricate the piston.
One side note: In your instructions, I would strongly suggest using a pair of vice grips or a vice (like you had told me) because getting the hex screw threaded on tightly enough is important.
9/10 (-1 for lack of Instructions, not the actual build of the piston or its assembly)
EDIT: 10/10 due to instructions being online now
Installing the FPS Adjuster
I would really appreciate some written out instructions with pictures for this part (EDIT: Again, instructions online at the webpage). It can definitely get a little confusing for those who have had no experience taking apart their bolt before. Nevertheless, installation seemed fairly easy. It took me a moment to realize which screw I had to unscrew, that the bar was holding the nozzle in place, and on the other side was spring tension. Once I removed the bar, dropping in the FPS adjuster was a simple task, and reassemble was even easier.
With the bolt back in the rifle, I experienced a random issue. I could not pull back my bolt. Upon further inspection this was caused by an improper alignment of the bolt carrier and the buffer/buffer spring assembly. Part of the bolt carrier was catching on the side of the lower receiver somewhere. I don't see how the internal parts of the bolt being changed could have affected this. There isn't really a fix for it either, I just jiggled the latch slightly, and made sure the upper receiver was pressed down firmly, and I haven't experienced the problem again. Therefore, I am considering this a random occurrence and having nothing to do with the upgrades.
So far I have filled up one magazine with gas, and dry fired about 15 times. There are no signs of anything wrong. Everything cycled as it should, bolt catch worked every time, etc.
9/10 (-1 for lack of Instructions, not the actually build of adjuster or its assembly)
EDIT: 10/10 due to instructions online now
Thus far, I am ecstatic over the new parts, and cannot wait to being FPS testing on Saturday.
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"Conclusion (pending FPS test for different combinations of spacers, and efficiency [pending])"
Werner Dahm
Durability
After using the O-Ring piston for just under 300 rounds, I have noticed little to no wear at all on the piston. The O-Ring on the piston is in pristine shape, and does not appear to be forming any kind of prolonged wear. There are no chunks missing, no tears, no "flat areas" and no stretching of the O-Ring whatsoever. Therefore, I would not question the durability of the O-Ring Piston, and I wouldn't change anything in its engineering either. It works, and excels in what it was designed to do.
After using the FPS Adjuster, I can draw a similar conclusion. Upon inspecting the air nozzle, I noticed no wear on the nozzle at all. It seems to be holding up, with no obvious difference in form. The testing on the FPS adjuster thus far has only been done with the o-ring itself, and with no spacers so I cannot conclude anything useful about the spacers themselves yet. Regardless, if they were sourced from similar manufacturers, I would not hesitate to speculate that they would hold up just fine as well.
Performance
The performance of the O-ring piston was nothing less than terrific. I felt that my FPS was consistent throughout testing, and that I was not getting any compression leakage at all. The O-ring seems to do its job again and again, creating a good seal with the correct amount of lube applied. The body of the piston doesn't seem to collide with any other parts of the carrier when in use. I don't hear any odd noises when the bolt cycles, and upon detailed inspection after good use, I did not notice any further wear of other parts on the carrier. So far, using the factory blue lock-tite that had been applied to the piston's screw in the factory, the piston has stayed solid and does not have any play, nor does it rotate at all.
The performance of the FPS Adjuster was likewise first-rate. Using no spacers, and 0.20 bb's at 58 degrees Fahrenheit, I chrono'd at 385, 379, 371 fps in three successive shots, fired at 1 second intervals. The fact that I was firing at 58 F and 385 fps helps confirm a presumed target FPS of about 400 fps in 70 - 75 F conditions. I was very satisfied with the FPS drops in the successive shots fired, being that each interval was only 7 fps on average. I hope to do a more extensive gas efficiency test in the future, however my living situation (apartment) makes that hard to do on a whim. Once I get my hands on a chronograph, I will do testing with all possible combinations of spacers and report their fps readings as well. The final two test's will then complete my overall evaluation of this product.
Overall Satisfaction
Regarding both durability and performance, as well as packaging and installation, I would be cheating Cradle Airsoft to give the O-Ring Piston rating less than 10/10. Superb engineering combined with top of the line materials has led this product to outperform the original KJW/TK piston by leaps and bounds. I see this piston standing up to many thousands of rounds with zero problems.
As for the FPS Adjuster, as far as testing can show, I am very satisfied with this as well. I am ranking the FPS adjuster as a 9/10 overall. It can definitely stand up to cycling the bolt and firing the training weapon thousands if not tens of thousands of times over. The reason I do not issue a 10/10 ranking is plainly due to the fact that changing the FPS is not as easy as I would have hoped in a hypothetical fps adjusting product. The fact that I have to open my bolt up to adjust the FPS is slightly more cumbersome than a turn of a hex screw, however the user does get used to it and it becomes second nature quickly. Upon further usage, I do recommend an "FPS Guideline" Chart to be included with this product (EDIT: This will be most likely hosted on the Cradle Airsoft website). That way, instead of each individual user having to chart out their own rifles FPS on each combination of shims, they can simple turn to the chart and look up which combination would probably work best for their desired FPS.
KJW M4
in Rifles (Gas)
Posted
Yes, to confirm, the KJW is compatible with RS pistol grips. Just watch out for the spring when you take off the grip. It sits oddly in the Magpul MIAD grip, and you need to put something between the spring and the grip to keep it in place. The spring gives your selector ball bearing tension, so you'll want to make sure thats not hanging out of its place.