senators2904 Posted August 17, 2010 Report Share Posted August 17, 2010 yup yup Quote Link to post Share on other sites
JLiu Posted August 17, 2010 Report Share Posted August 17, 2010 Is there a fix if I accidentally removed the pin that holds upper and lower receivers together or am I completely SOL? Quote Link to post Share on other sites
t_hum Posted August 17, 2010 Report Share Posted August 17, 2010 Should just go back in. There is a small detent pin that may keep it from going back in easily. Hold the little pin down with something small from the opposite side (chop sticks or a pen will do) and then insert the takedown pin back into the gun. Quote Link to post Share on other sites
JLiu Posted August 17, 2010 Report Share Posted August 17, 2010 Thanks for the quick reply  There's no way to remove the detent pin from behind by removing the stock/buffer tube is there? (I just made the problem even worse by the worst possible luck in choosing the "something small" to hold the pin down with. It'd almost be funny if it wasn't so depressing) Quote Link to post Share on other sites
t_hum Posted August 17, 2010 Report Share Posted August 17, 2010 You can remove the spring and detent pin from the back side by removing the stock tube and plate. But its more of a hassle. What is keeping you from doing it from the front side? Quote Link to post Share on other sites
JLiu Posted August 17, 2010 Report Share Posted August 17, 2010 (edited) The handiest small chopstick shaped item was this plastic mini fishing rod toy kinda thing which conveniently had holes THE EXACT SIZE of the detent pin at 1 cm intervals. Pretty sure you can guess what happened when I pushed it through to hold the detent pin in place... >< Â Edit: Any chance you could walk me through removing the stock tube and plate? I feel like I'm one horribly unlucky mistake/oversight away from having to throw the gun into the parts bin. Edited August 17, 2010 by JLiu Quote Link to post Share on other sites
poopstania Posted August 17, 2010 Report Share Posted August 17, 2010 If you take the buttstock off (pull the adjustment lever instead of squeezing it), there will be a screw head on back of the buffer tube. This hold the buffer spring (which is very large) inside the tube. Remove the screw, but keep that in mind. The buffer tube external should then slide off, along with the plate. Quote Link to post Share on other sites
JLiu Posted August 17, 2010 Report Share Posted August 17, 2010 I removed the stock, screw, and spring. The stock plate still won't come off though. Do I have to unscrew it? Quote Link to post Share on other sites
poopstania Posted August 17, 2010 Report Share Posted August 17, 2010 It should come off. Just try wiggling it to get it to loosen. That's how it works for me. Quote Link to post Share on other sites
Mini-Support Posted August 17, 2010 Report Share Posted August 17, 2010 There is a small allen screw in the bottom of the buffer tube at the back. Make sure thats loose, 1.5mm i think. Quote Link to post Share on other sites
JLiu Posted August 17, 2010 Report Share Posted August 17, 2010 Thanks for all the help guys, really appreciate it. It's been the highlight of an otherwise rough day. Â I ended up clearing the trapped plastic by slowly removing it with a knife so there was no need to remove the stock plate. Gun's functional again. Quote Link to post Share on other sites
Raven1 Posted August 18, 2010 Report Share Posted August 18, 2010 (edited) hey guys just a quick question... while cleaning my m4 today two smaller parts, a spring and what seems to be a cap for the spring fell out of my piston cup today... i have no idea as to how to put them back in? when checking the manual the parts are supposed to be 17, and 17a and 35 being the spring but only that one black cap fell out and it looks nothing like the parts displayed in the manual. its really weird and i was wondering i figured you guys would know about this... heres a link to the parts mentioned. http://www.arniesairsoft.co.uk/forums/index.php?app=gallery&module=user&user=66582&do=view_album&album=1763 Â Occasionally you will need to look up through the magazine well and verify that the plunger is fully seated against the pin that passes through both sides of the BCG. Â Â The Sequence of Installation is: Screw In Round Pin ( Part # 24 ) is removed from the Left Side of the Bolt Cup ( Part # 15 ) The plunger ( Part # 17 ) comes out next. Followed by the Spring ( Part # 35 ) Â To Install hold the Bolt Cup NOZZLE Pointing Straight Down Drop In Spring ( Part # 35 ) Drop In Plunger ( Part # 17 ) with O-Ring ( Part # 17A ) Installed Onto Plunger Use A Ball Point Pen or Similar to Verify the plunger closes and seats into the inside of the nozzle easily. If it does not then there is some debris there that needs to be cleaned/removed. Once you are Sure The Plunger is moving freely and seating smoothly. Push down on the plunger with ball point pen or similar. This will allow the Screw in round pin to be installed from the side of the bolt cup. Pass the screw in round pin Over the plunger and fasten down screw in round pin once you see it is capturing and holding the plunger. Â Â In Short the plunger is slammed shut by pressure from the expanding gases. The gases flow around the 4 internal orifices of the plunger. BB is expelled out of the inner barrel. Pressure continues to climb and over comes the plunger spring ( Part # 35 ) pressure. Closing the Plunger ( Part # 17 ) against its O-Ring Seal ( Part # 17A ) . Pressure Continues to rise pushing back against the piston driving the carrier into the buffer tube. Â Â The Phenomenon here is the Plastic Construction of the Plunger ( Part # 17 ) is it deteriorates over time and WILL Crack. When It Does Crack it breaks apart from the constant stress of cycling the bolt carrier group. This also destroys the Spring ( Part # 35 ) and O-Ring Seal ( Part # 17A ) Along with it. Â Â I seriously recommend using the Cradle Piston as it is Billet Aluminum and will never break apart. From then on all you will need to do is replace the spring ( Part # 35 ) every 5000 BBs shot. Edited August 18, 2010 by Raven1 1 Quote Link to post Share on other sites
atf343 Posted August 19, 2010 Report Share Posted August 19, 2010 I regret to inform you all that I must give up my KJW M4 CQB rifle... I've come to this decision because I am going through money issues, and I need to pay bills off. Â Hi, Your link to your sales page is broken. But in any case, is the sale still up? How much are you looking to sell your rifle and may I have pics please? I'm currently in Thailand so if "exporting" is an issue for you, let me know, thanks Quote Link to post Share on other sites
nickthebrick65 Posted August 19, 2010 Report Share Posted August 19, 2010 Hi, Your link to your sales page is broken. But in any case, is the sale still up? How much are you looking to sell your rifle and may I have pics please? I'm currently in Thailand so if "exporting" is an issue for you, let me know, thanks   It isn't broken, you just have to have 100 posts before you can view classifieds on this site. Quote Link to post Share on other sites
dotty3107 Posted August 19, 2010 Report Share Posted August 19, 2010 (edited) I'm glad to report that King Arms high grade sling adapter has been installed onto my KJW M4. Fitting is a bit tight but nothing to worry about I've scratched some of the paint from the stock tube. For more information on mentioned sling adapter follow the link: http://shop.ehobbyasia.com/accessories/sling-swivels/king-arms-high-grade-sling-adapter.html  Price is reasonable and quality is very good to excellent. My recommendation to all user that cannot afford DD or TD sling adapters.  This is how it looks like on my M4: Edited August 19, 2010 by dotty3107 Quote Link to post Share on other sites
poopstania Posted August 19, 2010 Report Share Posted August 19, 2010 Ok, so from last night until just now, my KJW GBBR has gone from this: Â Â To this: Â Â Â Â In response to just receiving my RS LaRue handguard. It is awesome. And I definitely enjoy SBRs -- the other one was a bit too heavy and "out there." Â Now I need to replace the grip with a MagPul MOE or MIAD -- wasn't there some problem with those on the KJW? I am putting either my Troy BUIS or my LMT BUIS on there, and need to make a FH work with this incorrectly-threaded barrel. Â Thoughts? Quote Link to post Share on other sites
suicidalsnowman Posted August 19, 2010 Report Share Posted August 19, 2010 If you use the real MIAD grip you'll have to use the original grip screw and the detent pin and spring for the selector go straight down, opposed to out at 45 degrees as the MIAD is designed for. I just wedged a small piece of scrap metal into the grip, you'll be able to see where it needs to go when you see the MIAD grip, and it works fine. Quote Link to post Share on other sites
kolumbo69 Posted August 20, 2010 Report Share Posted August 20, 2010 Anybody find any mags in stock again!? Quote Link to post Share on other sites
dotty3107 Posted August 20, 2010 Report Share Posted August 20, 2010 (edited) I also changed my KJW M4 look yesterday. All Magpul parts (FG) are removed and my KJW is converted to SOPMOD. Â Â Â Â Â Kit list: - Element LaRue 7.0 RAS - Element LaRue Tactical BUIS - G&P QD Raider Foregrip - ACM Aimpoint replika - King Arms High Grade Sling Adapter - Element M600c Flashlight (not included on the picture) Â Can anyone confirm information that the reinforced upper receiver is/will be made by KJW? I also have small crack on mine and would like to change it. Edited August 20, 2010 by dotty3107 Quote Link to post Share on other sites
dotty3107 Posted August 20, 2010 Report Share Posted August 20, 2010 (edited) I sent a question to G&P about production of full metal body for KJW M4 a week ago. They responded to my e-mail yesterday: Â "Dear Tomislav, We do not have plans to make metal body for KJW M4 in the future. G&P Webmaster" Â Guess we're all stuck with KJW upper for now Maybe some other company will recognize the quality of this platform and will start to produce some after market parts. At least I hope that KJW will make reinforced upper sometime soon. Cause this is the only weak point of this GBBR so far IMHO. Edited August 20, 2010 by dotty3107 Quote Link to post Share on other sites
senators2904 Posted August 21, 2010 Report Share Posted August 21, 2010 @ Raven1 Â thanks man i already talked to claire and plan on getting 2 sets of the three parts that broke along with a rubber band. as far as the cradle piston i guess im gonna have to get it now... but, in time. where im going i wont be airsofting for quite some time. thanks again man. Quote Link to post Share on other sites
RayL Posted August 21, 2010 Report Share Posted August 21, 2010 Ok, so from last night until just now, my KJW GBBR has gone from this: Â To this: Â In response to just receiving my RS LaRue handguard. It is awesome. And I definitely enjoy SBRs -- the other one was a bit too heavy and "out there." Â Now I need to replace the grip with a MagPul MOE or MIAD -- wasn't there some problem with those on the KJW? I am putting either my Troy BUIS or my LMT BUIS on there, and need to make a FH work with this incorrectly-threaded barrel. Â Thoughts? Â Why are you posting pictures of your airsoft GBBR on AR15.com? Quote Link to post Share on other sites
poopstania Posted August 22, 2010 Report Share Posted August 22, 2010 Why are you posting pictures of your airsoft GBBR on AR15.com? Â It's not, I just make one build for RS and make a copy of what I like onto my GBBR, or my AEG. I find a set-up I prefer, and use it for everything. Quote Link to post Share on other sites
t_hum Posted August 23, 2010 Report Share Posted August 23, 2010 You may recall a computer rendering I posted a few weeks ago of a new BCG design made from billet 7075. Ive had it rapid prototyped and have the following pic to show. The design is going to have a new feature or two added that Im carrying over from the WA project. The basic premise is that you can buy just one part and have almost everything I offer in just one component rather than buying and fitting various parts to your stock carrier. And its more durable to boot. Â Quote Link to post Share on other sites
suicidalsnowman Posted August 23, 2010 Report Share Posted August 23, 2010 Is the velocity adjustment simplified in this new BCG? Quote Link to post Share on other sites
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