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-   -   Tanio Koba / KJW M4 GBBR Basic Information and FAQ (

chris62 March 18th, 2010 04:10

For the purposes of Airsoft almost all guns use the same 6mm bb; so calibre will not matter.

FridayNightGamer March 18th, 2010 13:40

The receiver is a different shape to accommodate the larger rounds. The closest things that can be made with the KJW M4 are the Mk 12, SAM-R and SDM-R.

ujiro March 18th, 2010 13:42


Originally Posted by andrew321 (Post 1187906)
Goddamn, This is going to be frustrating to get this done. but a GBB SR-25 will be worth it when its together.

Out of the ASC combined knowledge, can we find what one would need to more or less make a kjw m4 into an SR-25?

Literally not possible. The only parts the same on an SR25 and an AR15 are the ones that aren't unique: stock, grip, front kit (well, not really, but in airsoft, yeah. Difference is barrel bore on the RS. For airsoft, they are the same kits), and accessories. Both the receiver, bolt and magazine are all entirely different. "Converting" an AR15 into an SR25 is not possible.

andrew321 March 18th, 2010 15:47

Wait, I must be missing something. For airsoft, i thought SR-25's were pretty much just an M4 body, with 12" front RIS, and a M16 fixed stock, guess not.

I'm just looking to put a 12" RIS, and fixed stock on. Wondered if people knew what fit. Kody says the front is real steal threaded. As for the fixed stock, no one seems to know. I may try a real steal fixed, or a WA with slight modding to attach it.

ujiro March 18th, 2010 15:51

What is the threading on the buffer tubes of KJWs? If its real steel threading, than either a real steel or WA stock will work on it.

As far as SR25s go... No sir. In airsoft, there are actual SR25s. I had one. They are gorgeous; definitely not just an M4 body with a big RIS and fixed stock.

Look up pics of the G&P SR25, or the CA25, or G&G GR25. Cool stuff. What you want to make is like a SAM-R, or standard DMR

andrew321 March 18th, 2010 18:33

Thanks, I'll remember that.

The rear buffer tube is 100% unique to the gun, and wont fit without some modification. That much seems confirmed.

What I want to know (i've heard both) is whether the front threads for mounting an RIS are AEG compatable like

or Real Steel, like a Daniel Defence or madbull.

baker_Jeff March 18th, 2010 18:47

The front is threaded for real steel/DD.


andrew321 March 18th, 2010 20:07

Thank you.

I just need to find one now.

hondatech March 18th, 2010 21:59


Originally Posted by andrew321 (Post 1189459)
I'm just looking to put a 12" RIS, and fixed stock on.

Tokyo Model has an adapter for adding a fixed buttstock. At least that what it looks like its for :confused:

andrew321 March 18th, 2010 23:29

whaaat, that does look like what it would be for...I just can figure out where tf thats supposed to thread into. does it replace the buffer tube? or screw into the end of it??

I'm willing to try it. I wonder if it will fit a GBBR, real steel, or AEG fixed...

Rookie Ab March 19th, 2010 08:00

They also have the inner barrel you might want;

andrew321 March 22nd, 2010 18:18

Would an "AR-15 Variant" Real Steel RAS have the same threads as any RS M-series?

I'm picking one of these up if it'll fit :D

Goldman March 22nd, 2010 18:45

That looks like a knock off larue 13.2, which can be had cheaper at

andrew321 March 22nd, 2010 22:36

Yeah, but are they Real Steel? the whole point of not buying a cheap knock off, is because it has to thread properly.

EDIT: say's "he fits them on ICS/CA/TM AND Real Steel firearms"

Conker March 22nd, 2010 22:49

The one you linked IS a knock-off. It's written on the eBay page.

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