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Tanio Koba / KJW M4 GBBR Basic Information and FAQ

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Old April 30th, 2010, 10:18   #76
andrew321
 
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Looks nice!

I went for a fixed stock on mine and an acog mounted on carry handle.

Now all I need is for mags to GET IN STOCK ANYWHERE
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Old May 1st, 2010, 21:06   #77
JonMaximus
 
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What sights work well with the GBB? I had an acog/dot sight but the recoil didn't agree with it and it would shut off after a few shots.

I think want to pick up an acog sight or dot sight (that actually shows up in the sun) with maybe 2x zoom. Any suggestions?
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Old May 2nd, 2010, 16:22   #78
Wilson
 
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What is everyone rocking for spacers in order to get the ~400fps as desired?
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Old May 2nd, 2010, 16:53   #79
GSK88
 
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Originally Posted by JonMaximus View Post
What sights work well with the GBB? I had an acog/dot sight but the recoil didn't agree with it and it would shut off after a few shots.

I think want to pick up an acog sight or dot sight (that actually shows up in the sun) with maybe 2x zoom. Any suggestions?
A real rifle sight lol. I had several clones on two different GBBRs and the only sight that stayed and kept a zero was my real EOtech.
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Old May 3rd, 2010, 01:06   #80
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Hi guys I own my KJW M4 since October 2009 and believe me it is a reliable gun to start with. It is my first Airsoft gun and still going strong recently my outer barrel has been modified by a friend and pay 40 dollars. The outer barrel was given to me by a friend an AEG CQB outer barrel I bring it to him and modify the barrel and assembled it back. Just to show you how it looks like here it is.
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Old May 3rd, 2010, 01:08   #81
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Looks fantastic!
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Old May 3rd, 2010, 01:42   #82
Amos
 
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I really need some friggen' replacement parts... Sent a message to KJ a bit over a week ago with no response...

any help would be appreciated
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Old May 3rd, 2010, 13:10   #83
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Which parts?
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Old May 3rd, 2010, 19:45   #84
andrew321
 
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+1 for what the heck spacers are you running for 400?? I spaced out, then my shots went about 100fps...

If I just had a chrono...



I'm also looking for a piston cup (or whole bolt assembly..).
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Old May 5th, 2010, 16:49   #85
soul sniper
 
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i guys do you know if i can fit a WA or We lower receiver on a kjw m4
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Old May 5th, 2010, 17:15   #86
Amos
 
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Which parts?
Whole bunch of tiny springs and other spare parts..

KJ FINALLY emailed me back.. and they should be on the way sometime within the next year lol
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Old May 5th, 2010, 17:27   #87
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i guys do you know if i can fit a WA or We lower receiver on a kjw m4
Absolutely not, both systems are totally different.
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Old May 6th, 2010, 21:58   #88
sushi_boy604
 
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So I am still having issues with the cocking of the gun. I am gasing up my magazine. I fire in single shot, it is really weak. If i fire on auto, it fires one shot, and I have to recock. Any ideas?\

UPDATE: Turns out it the piston ring is f***ed. I also noticed damage to my cylinder. Do i need a new one? Is this causing my problems? Thanks.
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Last edited by sushi_boy604; May 6th, 2010 at 22:47.. Reason: UPDATE
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Old May 7th, 2010, 09:01   #89
Rookie Ab
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Yes,you need a new one.I would think that all your gas pressure is slipping past and the bolt is not cycling proper.

You could order the Cradle oring piston instead of a stock replacement piston ring.

Is your return belt damaged or stretched? part#26 I'm just wondering how that would happen to the piston ring unless it was being pulled back too far(all the way out) of the cylinder.Then catching the edge of the cylinder as it goes forward.I'm pretty sure that is what the belt is for to keep that piston from pulling all the way out of the cylinder. (my 2 cents)
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Old May 7th, 2010, 09:45   #90
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I had the same problem. Crade o-ring piston fixed it right up, and actually shot better then stock.


Hey guys, I'm looking to order mags...uncompany is the only one with them in stock right now. I've been hearing some bad rep their way right now. Since it will be a 400$ order, should I wait it out till stock comes in somewhere, or give them a go? Would just wait, but I'd kind of like to game the gun THIS summer..

And whats shipping roughly from Uncompany? I hate that email quote system.

Last edited by andrew321; May 7th, 2010 at 12:47..
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