[goldentrigun]

http://www.airsoftforum.com/board/upgrading-Ares-m200-inter-t231627.html
http://www.deepfire.com.hk/ProductContent.asp?ProductID=279

I think you should be doing research on your own too.
I don't think anyone carries that barrel length probably because it would be so difficult to ship and the market for that barrel length is so small. Unlike the length which is utterly ridiculous.

http://edgicustom-usa.com/custom_work.php
they will make custom 800mm barrels.

socom gear says their m200 has a 650mm inner barrel stock.
http://socomgear.com/english/index.php?main_page=product_info&cPath=10&products_id=51

 

[goldentrigun]

Nothing is made inside the US. It's all made overseas. I'm not sure what you are getting at with that statement other then you don't want to pay that much for shipping. Also, I'm not even sure what type of hop up system that uses OR if you can even use AEG barrels on that gun.

 

[goldentrigun]

Just buy a custom one from the link I posted above. They aren't sold in the us and every post I see using google says they use that website because no one else makes them.

Why are you looking into upgrade parts if you are already thinking on trading it for a RS SVD?