fadz Posted September 3, 2011 Report Share Posted September 3, 2011 my RA-Tech piston ring (part no. 9) of the piston cup was ripped last week...That's the reason my M4 stopped cycling, the broken ring snagged the edge of the V1 bolt cylinder and even chipping off a small chunk. Ugh. CJ, gotta try one of those piston rings of yours...I already busted two rings, the stock and the RA Tech...kept the RA Tech for now, rotated it so that the damaged portion is not aligned with the chipped part of the cylinder and then greased it thoroughly..works for now but I am not holding my breath... Once I get my hands on a Cradle Velocity Reducer though, I will use my V2 BCG for our low fps games and just put my V1 BCG in reserve...along with its bent RA Tech Npas and chipped RA Tech piston ring... Quote Link to post Share on other sites
Cj Radge Posted September 5, 2011 Report Share Posted September 5, 2011 The Cj's piston ring worked great for the whole day game yesterday. Fadz and Freon, let me know how it works for you. Quote Link to post Share on other sites
freon Posted September 5, 2011 Report Share Posted September 5, 2011 Easy to install on my v1 bolt but I need some help with my v2 bolt. Quote Link to post Share on other sites
Kai_Wolf Posted September 5, 2011 Report Share Posted September 5, 2011 Let us know if there is any way to ship those rings out CJ. Im interested in buying one Quote Link to post Share on other sites
Cj Radge Posted September 5, 2011 Report Share Posted September 5, 2011 Hi Kai_Wolf, sure I can ship this small item. But I have to check on the shipping cost, but I think regular mail here will do. Quote Link to post Share on other sites
Kai_Wolf Posted September 6, 2011 Report Share Posted September 6, 2011 That sounds great. Let me know how much it would be for two or three if at all possible. Quote Link to post Share on other sites
johnyew Posted September 7, 2011 Report Share Posted September 7, 2011 I would be in for 2.... Quote Link to post Share on other sites
delarosa Posted September 7, 2011 Report Share Posted September 7, 2011 Odds on its not coming from there, I had a leak that sounded it was coming from the release valve. It turned out the mid-section o- ring was leaking. Strip, clean, regrease, rebuild. Its an easy gas mag to work on. replaced the mid section ring but theres still leak, disassembled everything and nothing seems wrong, the other o ring in the valve too are still in a very good condition. I dont know where the sounds are coming from but do anyone here have problems with the valve yet? Do I need to change it? Quote Link to post Share on other sites
PanteraTigris Posted September 7, 2011 Report Share Posted September 7, 2011 Immerse it in water and see where the bubbles are coming from. Quote Link to post Share on other sites
delarosa Posted September 7, 2011 Report Share Posted September 7, 2011 Immerse it in water and see where the bubbles are coming from. Sorry but are you sure thats okay for the mag? I mean there wont be anything rusty after that would it? Quote Link to post Share on other sites
freon Posted September 7, 2011 Report Share Posted September 7, 2011 Sorry but are you sure thats okay for the mag? I mean there wont be anything rusty after that would it? Make sure you re-oil the spring before you put it in, otherwise it should be ok. Quote Link to post Share on other sites
delarosa Posted September 7, 2011 Report Share Posted September 7, 2011 Make sure you re-oil the spring before you put it in, otherwise it should be ok. Alright, gonna try that and report back, thanks Quote Link to post Share on other sites
Cj Radge Posted September 7, 2011 Report Share Posted September 7, 2011 That sounds great. Let me know how much it would be for two or three if at all possible. I would be in for 2.... @Kai_wolf and Johnyew, It is cheaper to send by normal post mail but will take around 7 to 10 days to reach you. I can send you CJ's Solution Piston Ring/Cup for KJW TK GBBr (Part no.9) for 3USD each + 2USD for normal postal mail. I have not check the cost of normal postal mail but It should be around 2USD only. You can pay me in my paypal account. Let me know your order confirmation. Thanks! Quote Link to post Share on other sites
Saberwing Posted September 7, 2011 Report Share Posted September 7, 2011 im wondering if i should get another one and just adjust it before i install it? or get the cradle one? and saying this is it worth getting the cradle piston cup and using that to replace the X type piston thing that the new ones seem to come with? Just get the Cradle Velocity Adjuster. the RA-Tech NPAS will become unusable as mine did... My Cradle is working perfect though! Quote Link to post Share on other sites
swishy Posted September 7, 2011 Report Share Posted September 7, 2011 (edited) hey. First of all, I'm new here and couldn't find a place to put an intro, So I'm just gunna say hi here. hi Anyway, does anyone know what range the KJW CQBR can pull? thanks! edit: just found the intro section. intro is being posted now. Edited September 7, 2011 by swishy Quote Link to post Share on other sites
Darkstrike Posted September 7, 2011 Report Share Posted September 7, 2011 Just get the Cradle Velocity Adjuster. the RA-Tech NPAS will become unusable as mine did... My Cradle is working perfect though! thanks dude my cradle piston and reducer came yesterday Quote Link to post Share on other sites
PanteraTigris Posted September 8, 2011 Report Share Posted September 8, 2011 Sorry but are you sure thats okay for the mag? I mean there wont be anything rusty after that would it? Yup. As a matter of fact I've been submerging my Mag for the past 3 years, sometimes even in murky waters during MILSIM games and i never lubed the springs. So far they are still ok with no jams whatsoever. Quote Link to post Share on other sites
WTF?Shane Posted September 9, 2011 Report Share Posted September 9, 2011 (edited) Alright, got my new version bolt in. No pictures needed as others already posted some. What I really would like is a walk through on how to disassemble and reassemble the bolt assembly. I'm too scared at the moment to start anything and possibly loose/strip/break something. I want to install my velocity reducer in it to play this weekend. Besides the bolt assembly here's my thoughts on the other items included in the kit. -V2 bolt catch is necessary (I highly think) as it provides clearance for the bolt to cycle properly. -V2 buffer, no comment as I haven't gave it a good look, only noticed the raised head. I might weigh the two just to see if there's a difference. Edit: Just thought of something. Raised surface on face of buffer might be to seat against the bolt carrier. Edited September 9, 2011 by WTF?Shane Quote Link to post Share on other sites
Kai_Wolf Posted September 9, 2011 Report Share Posted September 9, 2011 I am using a V1 bolt catch with a V2 bolt and though cyling is fine, I am noticing some strange hang ups and stiffness when trying to slap the paddle to send the bolt home. This might be why it is better to use V2. I need to pick one up. Quote Link to post Share on other sites
WTF?Shane Posted September 9, 2011 Report Share Posted September 9, 2011 (edited) I am using a V1 bolt catch with a V2 bolt and though cyling is fine, I am noticing some strange hang ups and stiffness when trying to slap the paddle to send the bolt home. This might be why it is better to use V2. I need to pick one up. Exactly. I noticed it when function testing the new bolt. When racking the charging handle, it would snag. I thought it was because it needed to be worn in. So I just racked it faster so it didn't snag. With a magazine in, it fired and cycled fine. Thinking about it, seeing as they provided me with a new bolt catch, it needed to be replaced. Edited September 9, 2011 by WTF?Shane Quote Link to post Share on other sites
Cj Radge Posted September 10, 2011 Report Share Posted September 10, 2011 (edited) Cj's Instruction: KJW Tanio Koba M4 GBBr V2 Bolt Disassembly. Includes instruction on how to replace piston ring (part no. 9) 1. Push the pin out using small screwdriver: 2. Pull the bolt face halfway then push the plastic guide outward as shown in the picture below 3. Pull the plastic guide out using pliers as shown in the pictures below: 4. Pull the bolt out away from the bolt carrier. note: the cylinder spring is a *badgeress* so you will have to pull the bolt harder until the spring pops-out. note: piston ring shown below was already upgraded with Cj's Solution Piston Ring (part no.9) Comparison between stock Piston ring and Cj's Solution Piston ring: 5. Remove the stock piston ring (part no.9) with flat screwdriver Replace the stock piston ring with Cj's Solution piston ring: 6. To disassemble the bolt head, Unscrew this pin: 7. Push the second small pin out Detailed location of the pin protruding out 8. Now you can take it apart (cylnder spring, piston body, floating valve and bolt face) 9. Complete picture of disassembled V2 Bolt: End. Thank you! Edited September 10, 2011 by Cj Radge Quote Link to post Share on other sites
Jackster802 Posted September 11, 2011 Report Share Posted September 11, 2011 If I buy one from Ehobby Asia right now, will it be a Ver.2? Or will I have to buy the parts from KJW to get it to be a Ver.2? Quote Link to post Share on other sites
Cj Radge Posted September 11, 2011 Report Share Posted September 11, 2011 @ Jackster, It depends if their stocks are new. In our case, me and my teammates ordered 5 KJW TK CQBr last month, 2 out of 5 came with V2 parts pre-installed. I would suggest call them first to confirm what version they have in stock. Quote Link to post Share on other sites
Jackster802 Posted September 11, 2011 Report Share Posted September 11, 2011 (edited) K. Thanks for the info. Where did you order from? Edited September 11, 2011 by Jackster802 Quote Link to post Share on other sites
WTF?Shane Posted September 11, 2011 Report Share Posted September 11, 2011 CJ, awesome guide. I took mine apart the other day and instead of popping out the pin in step 1, I unscrewed the pin in step 6. This made it a quite challenging when trying to put back together. I'll try out your method next time I need to open it up. Thanks for the picture instruction. Jackster, contact sales@kjworks.com.tw Quote Link to post Share on other sites
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