Duckling Posted August 28, 2009 Report Share Posted August 28, 2009 (edited) This is the same problem I have seen. Can you give details, ie, gas, temperature, how many shots before fracture & supplyer? Greg. Standard setup: Guarder 0.28g BB ASG GreenGas "Summer Type" (The term "summer Type" mens less oli) Temp. 19.5C Loaded my first 100 rounds worth of BB's, firing bursts of 10-20 rounds... fired 90 rounds, cylinder blew and blocked the bolt. Time spent firing the gun approx 5 sec. Time spent trawling the internet for new Part #23 +75h Time spent bitching... not counted. The gun is from EhobbyAsia, and after sending them the pix, they are trying to get me a new part. But they say it may be a month... before I'l get it, as the gun is so new, nobody have the parts in stock. Edited August 28, 2009 by Duckling Quote Link to post Share on other sites
galactica Posted August 28, 2009 Report Share Posted August 28, 2009 one of my team-mates has access to a CNC machine - does the cylinder look like it could be re-created in aluminium without too much drama? Quote Link to post Share on other sites
Panoptes Posted August 28, 2009 Report Share Posted August 28, 2009 one of my team-mates has access to a CNC machine - does the cylinder look like it could be re-created in aluminium without too much drama? I'd buy one... just in case. Quote Link to post Share on other sites
Duckling Posted August 28, 2009 Report Share Posted August 28, 2009 one of my team-mates has access to a CNC machine - does the cylinder look like it could be re-created in aluminium without too much drama? An cylinder in Aluminium, would not be a good thing, due to cool down, and the thermal properties of Aluminium. Quote Link to post Share on other sites
greg Posted August 28, 2009 Report Share Posted August 28, 2009 An cylinder in Aluminium, would not be a good thing, due to cool down, and the thermal properties of Aluminium. Agreed, a Less conductive material like plastic would be better. Greg. Quote Link to post Share on other sites
galactica Posted August 28, 2009 Report Share Posted August 28, 2009 Agreed, a Less conductive material like plastic would be better. Greg. hmmm, well that'd be cheaper anyway! Bit quicker to mill too. But what kind of plastic? Quote Link to post Share on other sites
RacingManiac Posted August 28, 2009 Report Share Posted August 28, 2009 Aluminum also is not very strong in thin section like that.... Quote Link to post Share on other sites
galactica Posted August 28, 2009 Report Share Posted August 28, 2009 What about BRASS? Quote Link to post Share on other sites
RacingManiac Posted August 28, 2009 Report Share Posted August 28, 2009 Brass probably isn't a bad idea.... My hope is that if the KWA is like the KSC then the price point should entice more to pickup one, and there will be an aftermarket for it... Quote Link to post Share on other sites
somegirls Posted August 28, 2009 Author Report Share Posted August 28, 2009 Well, the KSC/KWA pistols have plastic cylinders as well and they don't have such an issue. Let's hope it was just a bad batch. Quote Link to post Share on other sites
jesTer Posted August 29, 2009 Report Share Posted August 29, 2009 OK... skirmish this morning... 1 mag filled with 134a, shot fine. Filled with propane, the blowback cylinder broke after 5 shots on semi. Last week, it went through 200 rounds in combinations of semi and full auto on green gas with no problems. Another brought his MP7 which has gone through hundreds of rounds on green gas. 2 10 minute skirmishes later, the blowback cylinder cracked too... Someone please PLEASE come out with a reinforced part... Quote Link to post Share on other sites
Panoptes Posted August 29, 2009 Report Share Posted August 29, 2009 Sorry to hear that. I'm tempted to stress test mine but until there's a viable (stronger) replacement part I think I'll just keep it on the wall for now... Not very happy with that of course..... Do KSC know about the problem? Quote Link to post Share on other sites
aaron2310 Posted August 29, 2009 Report Share Posted August 29, 2009 Does KSC have an english speaking place we can all e-mail to about the issue? Quote Link to post Share on other sites
Duckling Posted August 29, 2009 Report Share Posted August 29, 2009 Does KSC have an english speaking place we can all e-mail to about the issue? No. ... if they did, we would not have this discussion, would we ? Quote Link to post Share on other sites
Shinden Posted August 29, 2009 Report Share Posted August 29, 2009 Apparently that part is quite brittle. I am wondering if inserting the magazine with the bolt open (charging handle pulled) would help instead of jamming it in with the bolt closed. Then again, I have to say we should wait for a new nozzle to be made by a 3rd party. Quote Link to post Share on other sites
galactica Posted August 29, 2009 Report Share Posted August 29, 2009 bloody hell. I am (a) glad I bought a cheap KWA and ( only using it on 134 until something is DONE about this! Quote Link to post Share on other sites
jesTer Posted August 30, 2009 Report Share Posted August 30, 2009 The crack on mine is not as drastic as others. Nonetheless, it be broken. Sigh... Quote Link to post Share on other sites
galactica Posted August 30, 2009 Report Share Posted August 30, 2009 this might seem like a stupid question, but would it be possible to inject some araldite into the crack to seal it up again? Quote Link to post Share on other sites
Firefly0 Posted August 30, 2009 Report Share Posted August 30, 2009 I don't know if you guys know this but KWA USA claims that the KSC version is not reinforced to use green gas. Can somegirls (only KWA owner around here) and a KSC owner scan their parts diagram to see if something is really different? Quote Link to post Share on other sites
somegirls Posted August 30, 2009 Author Report Share Posted August 30, 2009 Sorry, Umarex doesn't give you a parts diagram...... Quote Link to post Share on other sites
galactica Posted August 30, 2009 Report Share Posted August 30, 2009 I don't know if you guys know this but KWA USA claims that the KSC version is not reinforced to use green gas. Can somegirls (only KWA owner around here) and a KSC owner scan their parts diagram to see if something is really different? link please to this KWA quote? I should have mine in a week or two (a KWA) Quote Link to post Share on other sites
Firefly0 Posted August 30, 2009 Report Share Posted August 30, 2009 Sure thing: http://www.kwausa.com/forums/index.php?showtopic=1426 Too bad Umarex doesn't have a part diagram, Do they sell a version with full auto anywhere? Or just semi versions on Germany? Quote Link to post Share on other sites
galactica Posted August 30, 2009 Report Share Posted August 30, 2009 Just about to hit the shelves in America in full auto. Quote Link to post Share on other sites
RacingManiac Posted August 30, 2009 Report Share Posted August 30, 2009 I am skeptical, since KWA or not they came from the same plant.... at any rate, probably not a bad idea to know anyway, whats the part number for this in KWA-system? Since it's more likely to obtain spare parts through that(not that mine is broken yet)... Quote Link to post Share on other sites
Duckling Posted August 31, 2009 Report Share Posted August 31, 2009 Sure thing: http://www.kwausa.com/forums/index.php?showtopic=1426 Too bad Umarex doesn't have a part diagram, Do they sell a version with full auto anywhere? Or just semi versions on Germany? This is the same ###### that we get from KWA-USA over and over again. They always claim (or allizard do) that there KWA weapons is different from alle other KWA weapons, as theres supposedly is designed in US by KWA-USA (although there own Homepage states that there guns i made i taiwan and designed in Japan). As there new M11A1 version came out allizard told the world that the new "SN2" gassystem were indeed an american invention, strange though that the "SN2" is identical to the System7 that KSC started making years ago. Strange that the KWA-USA "KP" series of SN2 pistols, uses same parts and magazines as the USP series System7 models, from KSC. This may be just pure luck, but to all others then allizard, it is the same guns. So, if KWA-USA claims that there M7A1 is different from the KSC one. I would take that statement quit lightly, until they produce a parts diagram that is not 100% identical to the KSC version. Think about it this way: We know that KSC have worked on the Mp7A1 for years. They make it with the System 7 gassystem, on the KWA factory. On the same factory, at the same time the new "company" KWA-USA shows up and ask the KWA factory to make them a... Mp7A1 that they just designed. And then, just to repeat this incredible streak of genius, Umarex comes along with the own plans for a Mp7A1 that only shoots semiauto for the german marked. Perhaps plausible to mr. allizard... I don't buy it. There is one product. One Mp7A1 GBB on the marked right now. It is designed by KSC and made on the KWA factory. KWA-USA and Umarex is just rebranders, trying to look like manufactures. End of story. The hole show about blown cylinders on new System 7 weapons is the same as we have seen it with the USP series and the M11, as they came out in the new versions. Especially the M11 sold i denmark as the special new ASG-M11 (made by KWA ) blew there nozzels. After the spare parts came out, the problem vanished... So, we just have to wait. All the blown cylinders is from KSC guns, made for the Japanese marked. We the non Japanese KSC owners do not interest KSC. As the KWA versions hit the international marked, and the cryes from owners with blown cylinders get to Taiwan, they'l make a less brittle cylinder and we will all be happy. The only big issue fore me is time, as I hate to have my newest 350$ toy sitting on a shelf, and not seeing any action. Oh yes, BTW: Only Germans have to live with the the strange law banning full auto on airsoft. Quote Link to post Share on other sites
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