Tanio Koba / KJW M4 GBBR Basic Information and FAQ

Saberwing · August 1st, 2011, 23:04

Quote:

Originally Posted by audi_bhoy

Saber, I'm wainting on your review to get me some !!

Not too sure when I'll have mine... Still waiting for KJW to notify me it's been shipped...

Amos · August 2nd, 2011, 00:02

The version 2 M4's are AWESOME!

Saberwing · August 2nd, 2011, 06:49

Quote:

Originally Posted by Amos

The version 2 M4's are AWESOME!

You bitch

andrewlaw · August 5th, 2011, 04:33

does anyone know how many spacers are needed for the cradle reducer to make the fps ~420? thanks

Heerven · August 5th, 2011, 07:56

1 thin spacer and one thick spacer at the room temperature. The spacers thickness should be around the edge of the craddle hole.

andrewlaw · August 5th, 2011, 13:20

thx

MasterSiconis · August 5th, 2011, 13:50

im looking at installing this (http://shop.ehobbyasia.com/magpul-pt...es-gbb-de.html) as a new stock, but I've heard of people having difficulties with stocks on the KJW m4. Would this one work? It is GBBR specific, but there is also an AEG version and a real gun version.

Help

beanie · August 5th, 2011, 15:17

Quote:

Originally Posted by MasterSiconis

im looking at installing this (http://shop.ehobbyasia.com/magpul-pt...es-gbb-de.html) as a new stock, but I've heard of people having difficulties with stocks on the KJW m4. Would this one work? It is GBBR specific, but there is also an AEG version and a real gun version.

Help

That won't fit on the KJW M4. The KJW M4 has a 2 piece buffer, an inner brass buffer that houses the spring, etc. and an outer "case" that locks onto the brass buffer for the stock to slide on to.

The brass inner tube is what is screwed into the lower receiver and those thread are much smaller than the buffer you have in mind. The only option, if you're hardcore, is to get someone to do a custom rethread of the lower receiver like raven1 did on this thread http://www.airsoftarizona.com/index....7597#msg207597

As you might know by now the Magpul PTS MOE stock is, as far as I know, the only compatible stock with the KJW buffer with no mods.

beanie · August 5th, 2011, 16:12

Look what I found in the mail...

I'll let you guys know how it shoots when I get it in.

**UPDATE**

Has more kick to it, probably because they used more metal to make it than they did Ver 1 carrier. Overall I think I like it. It has a very responsive feel to it now that THERE IS NO RUBBER BAND. I hope the extra kick doesn't lead to parts in the trigger and hammer to break.

Metal on metal bolt cycling sounds sooo nice. I think the bolt closes smoother. I like everything except the possible wear and tear.

beanie · August 5th, 2011, 21:30

Is it possible to over adjust the "trajectory hop dial" and mess up the cycling of the gun? My gun starts to stutter if I fire on full auto for long enough (20 shots approx.). The rate of fire seems to increase until the bolt cant keep up and stops cycling but the gas or hammer keeps going making a stuttering sound 2x or 3x faster than the normal rate of fire. I can make a video of the problem in action if needed.

delarosa · August 6th, 2011, 11:13

@beanie
I noticed that the new buffer it has a slight bump on the centre. Does that work similar to the cradle bolt extension on the new bolt?

beanie · August 6th, 2011, 19:04

Quote:

Originally Posted by delarosa

@beanie
I noticed that the new buffer it has a slight bump on the centre. Does that work similar to the cradle bolt extension on the new bolt?

I'm not sure what the cradle bolt extension is but the center of the new buffer piece is designed to fit together/slightly inside the new bolt like a male/female connection.

delarosa · August 7th, 2011, 00:38

Quote:

Originally Posted by beanie

I'm not sure what the cradle bolt extension is but the center of the new buffer piece is designed to fit together/slightly inside the new bolt like a male/female connection.

Ic, the cradle extension works to prevent the buffer from touching the buffer pin, so if you instal the extension, when you close the upper receiver, the buffer will slightly move towards inside the buffer tube (not touching the pin).

Its because there are issues where kjw owner have a broken lower receiver because of the pressure taken by the buffer pin every time the bolt cycle. Does the new buffer have the same function though?

Saberwing · August 9th, 2011, 07:01

So is there a new buffer and bolt catch too?

IggysPiggy · August 9th, 2011, 16:21

The bolt he ordered seems to come with a new buffer but the kj I bought that came stock with the new bolt did not come with the updated buffer. I can not comment on the bolt catch because I have not compared them closely.

On a side not I would suggest pulling the new bolt apart upon getting and checking the piston rubber. On mine after one mag the piston head was showing signs of wear and a little shaving was hanging off already. I took 2000 grit wet sand paper to the spot to resmooth the blemish and have had zero issues since.

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August 2nd, 2011, 00:02	#527
Amos Trader rating Join Date: Aug 2006 Location: Tokushima, Japan	The version 2 M4's are AWESOME! __________________ Custom Builds: FA3674U Krinkov G3SD6

August 5th, 2011, 07:56	#530
Heerven Trader rating Join Date: Nov 2009 Location: Montréal	1 thin spacer and one thick spacer at the room temperature. The spacers thickness should be around the edge of the craddle hole. __________________ We will find a way.

August 5th, 2011, 16:12	#534
beanie Trader rating Join Date: Apr 2011	Look what I found in the mail... I'll let you guys know how it shoots when I get it in. UPDATE Has more kick to it, probably because they used more metal to make it than they did Ver 1 carrier. Overall I think I like it. It has a very responsive feel to it now that THERE IS NO RUBBER BAND. I hope the extra kick doesn't lead to parts in the trigger and hammer to break. Metal on metal bolt cycling sounds sooo nice. I think the bolt closes smoother. I like everything except the possible wear and tear. Last edited by beanie; August 5th, 2011 at 21:20..

August 5th, 2011, 04:33	#529
andrewlaw Trader rating Join Date: Jul 2011 Location: edmonton	does anyone know how many spacers are needed for the cradle reducer to make the fps ~420? thanks

August 5th, 2011, 13:20	#531
andrewlaw Trader rating Join Date: Jul 2011 Location: edmonton	thx

August 5th, 2011, 13:50	#532
MasterSiconis Trader rating Join Date: Apr 2011	im looking at installing this (http://shop.ehobbyasia.com/magpul-pt...es-gbb-de.html) as a new stock, but I've heard of people having difficulties with stocks on the KJW m4. Would this one work? It is GBBR specific, but there is also an AEG version and a real gun version. Help

August 5th, 2011, 21:30	#535
beanie Trader rating Join Date: Apr 2011	Is it possible to over adjust the "trajectory hop dial" and mess up the cycling of the gun? My gun starts to stutter if I fire on full auto for long enough (20 shots approx.). The rate of fire seems to increase until the bolt cant keep up and stops cycling but the gas or hammer keeps going making a stuttering sound 2x or 3x faster than the normal rate of fire. I can make a video of the problem in action if needed. Last edited by beanie; August 6th, 2011 at 00:07..

August 6th, 2011, 11:13	#536
delarosa Trader rating Join Date: Feb 2011	@beanie I noticed that the new buffer it has a slight bump on the centre. Does that work similar to the cradle bolt extension on the new bolt?

August 9th, 2011, 07:01	#539
Saberwing Trader rating Join Date: Mar 2007 Location: London, ON	So is there a new buffer and bolt catch too? __________________ KJW Mk18 MOD1 BLOCK 2 - Well VSR-10 - Les Baer Ultimate Recon

August 9th, 2011, 16:21	#540
IggysPiggy Trader rating Join Date: Sep 2007	The bolt he ordered seems to come with a new buffer but the kj I bought that came stock with the new bolt did not come with the updated buffer. I can not comment on the bolt catch because I have not compared them closely. On a side not I would suggest pulling the new bolt apart upon getting and checking the piston rubber. On mine after one mag the piston head was showing signs of wear and a little shaving was hanging off already. I took 2000 grit wet sand paper to the spot to resmooth the blemish and have had zero issues since.

Tanio Koba / KJW M4 GBBR Basic Information and FAQ

Airsoft Guns Discussion