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Clarification of Rail systems


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#1 Jesse Hammil

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Posted 14 January 2014 - 03:57 PM

Hey guys,

I'm interested in changing out my rail for a longer one. I have a km4 RIS. Can I put a free float in this gun?  What rails fit?

I'm really confused by all the different rail systems out there.

#2 choochoo

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Posted 14 January 2014 - 04:08 PM

Yes, you can.
KM4 RIS before:
Posted Image

KM4 CQB/RIS/SR10 KWA franken gun
Posted Image

I believe any of the Madbull free float rails work too.

#3 hellcat

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Posted 14 January 2014 - 04:14 PM

I added a free float rail to my KM4-RIS.....I kept the same length and used a flip up front sight.

#4 Jesse Hammil

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Posted 14 January 2014 - 04:30 PM

Awesome. That effect is what I am looking for. How long is that rail in the second pic?

#5 choochoo

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Posted 14 January 2014 - 04:48 PM

That rail came off a KWA SR10

#6 Jesse Hammil

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Posted 14 January 2014 - 05:10 PM

Thanks.

#7 choochoo

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Posted 14 January 2014 - 09:42 PM

Sorry I realized  I didn't really answer your question.  10" long rail.  I took the front portion of the outer barrel off.  So the end of the barrel and gas block are in the rail.

#8 Jesse Hammil

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Posted 14 January 2014 - 10:51 PM

The RIS has a 2 part barrel? Mind blown.

#9 choochoo

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Posted 15 January 2014 - 10:21 AM

yup
Posted Image

#10 gcw360

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Posted 15 January 2014 - 05:29 PM

You can use the SR12 length with out changing the outer barrel.

This is my son's RIS with an SR12 rail and Quick Silver extenderPosted Image

#11 Jesse Hammil

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Posted 15 January 2014 - 09:23 PM

That looks awesome. Good tip. I love that style.

What is the length of that rail? Is the sr10 12inch?

Edited by Jesse Hammil, 15 January 2014 - 09:31 PM.


#12 choochoo

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Posted 16 January 2014 - 01:58 AM

SR12 is 12" rail and SR10 is 10"

#13 gcw360

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Posted 16 January 2014 - 07:40 PM

View PostJesse Hammil, on 15 January 2014 - 09:23 PM, said:

That looks awesome. Good tip. I love that style.

What is the length of that rail? Is the sr10 12inch?
12 inch

#14 Jesse Hammil

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Posted 17 January 2014 - 07:09 AM

Would this fit on kwa?
http://www.evike.com/products/44982/

#15 gcw360

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Posted 17 January 2014 - 09:35 AM

View PostJesse Hammil, on 17 January 2014 - 07:09 AM, said:

Would this fit on kwa?
http://www.evike.com/products/44982/
It should.

#16 Jesse Hammil

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Posted 17 January 2014 - 09:52 AM

Thanks!

#17 choochoo

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Posted 17 January 2014 - 10:41 AM

View PostJesse Hammil, on 17 January 2014 - 07:09 AM, said:

Would this fit on kwa?
http://www.evike.com/products/44982/
Funny, I almost went with that evike "Avengers" rail in the 10" size.  But, I found a nice used SR10 rail for the same price.  It's basically a LaRue Tactical rail replica.  Here's a nice chart to see how it would look to see with different rail length and barrel length configurations.  (sorry for the huge picture)
Posted Image
Let us know if it works.

#18 BLATEY

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Posted 17 January 2014 - 03:14 PM

I'm not sure if it's just me, but I can't see the picture.

#19 choochoo

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Posted 17 January 2014 - 04:11 PM

hmmmmmm..... let's try this again....
Posted Image

#20 choochoo

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Posted 17 January 2014 - 04:12 PM

It's not every conceivable combination, but it gives you a good idea of what combo you may want.




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