Tanio Koba / KJW M4 GBBR Basic Information and FAQ

[andrew321]

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

[JonMaximus]

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?

[Wilson]

What is everyone rocking for spacers in order to get the ~400fps as desired?

[GSK88]

Originally Posted by JonMaximus

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.

[brixx]

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.

[baker_Jeff]

Looks fantastic!

[Amos]

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

[baker_Jeff]

Which parts?

[andrew321]

+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..).

[soul sniper]

i guys do you know if i can fit a WA or We lower receiver on a kjw m4

[Amos]

Originally Posted by baker_Jeff

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

[Conker]

Originally Posted by soul sniper

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.

[sushi_boy604]

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.

[Rookie Ab]

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)

[andrew321]

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.