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Tanio Koba / KJW M4 GBBR Basic Information and FAQ

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Old December 2nd, 2014, 01:01   #976
DuCKy!
 
Join Date: Dec 2014
Comeau-SCS, thanks for answering my questions! Much appreciated!
Please the link below for a pic of my piston and seal:
CLICK ME!

Upon looking at another gun, it seems that I have an aftermarket piston too.. hmm?

Daishi, is the V1 bolt that bad? From my limited research, it's mainly less reliable in terms of FPS correct? The reason I got the V1 is because I'm in the land down under in NZ. We don't have a plethora of stuff available here! Just found someone selling this locally and so I went for it.

Grantmac, what aspects of the V1 bolt do you like? What's the main reason you run a V2 now?



An extra edit/question:
I'm running a Falcon 509mm 6.03mm, and the hopup is green, so I'm assuming it's Falcon as well. Seems like all the bits on my gun is Falcon.
Anyways, I stripped it all down, cleaned my barrel many times, took the hop-up out and washed it in warm soapy water, did the heat shrink mod on the hop-up lever arm thing, put it all back together, and shot some 0.25g bb's.
The hop-up seems to be doing OK vertically, it would stay "level" for at least 50m (160ft). However it would curve to the left quite significantly after say, 25m (80ft). Is my hop-up bucking buggered?

Last edited by DuCKy!; December 3rd, 2014 at 20:43..
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Old December 14th, 2014, 19:26   #977
grantmac
 
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Join Date: Jul 2008
Location: Victoria, BC
In m experience the V1 performs slightly better in cold weather and it's much easier to adjust the FPS if you need to run near field limits. Otherwise the V2 seems like an improvement in consistency and durability.

That piston is stock, but the piston seal is aftermarket. Likely a falcon.

In my personal opinion the gun is both more efficient and more consistent with a shorter barrel. It just doesn't perform well when you have to choke the gas system way down to get it to a fieldable FPS.

-Grant
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Old March 10th, 2015, 00:33   #978
redzaku
 
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Join Date: Jul 2010
Location: Edmonton
so my charging handle broke and just got a Hephaestus steel charging handle but it is extremely tight, is this normal? been taking off material and now it operable but still tight upon pulling it
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Old March 10th, 2015, 14:24   #979
OnePunch
 
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Join Date: Jan 2006
Location: WINNIPEG
I just noticed my charging handle is worn and cracked where the guide rod slides threw. Anyone else have this problem?
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Old March 10th, 2015, 14:52   #980
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Location: Toronto
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Quote:
Originally Posted by OnePunch View Post
I just noticed my charging handle is worn and cracked where the guide rod slides threw. Anyone else have this problem?
Time to get a REAL STEEL one!
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Old March 10th, 2015, 14:55   #981
redzaku
 
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Location: Edmonton
Quote:
Originally Posted by BioRage View Post
Time to get a REAL STEEL one!
Do tell, I wanna add a rainier arms raptor charging handle, I have read this thread twice and all its about the inner barrel and nothing about charging handles
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Old May 7th, 2015, 03:41   #982
IkarosCORE
 
Join Date: Jan 2015
Location: Calgary AB
New to GBBRs, but my charging handle has been moving with the recoil recently, as if it were a bolt. Any ideas? The hook and notch seem fine.
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Old May 27th, 2015, 19:09   #983
audi_bhoy
 
Join Date: Mar 2009
Location: Trois-Rivières
Make sure that the charging handle's latch still has it's spring to clamp on the upper receiver. You might want to check also if the bolt slides freely into the charging handle. You could always apply a little grease into the charging handle to smooth it out !
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