Barrel extention with a m4 flashhider?

A local Outlawz guy told me that I could get a barrel extention to go over my m4's flash hider that I can't take off.
You guys know where I could find and one would this work?

I was thinking I could put a extended tighter inner barrel, and make it come out the flash hider.
Then my goal was to hide the flash hider with the barrel extenstion.
Would this work?

would this work?
http://www.airsoftpost.com/bull-gemtech-halo-mock-supressor-black-p-27121.html

As long as it is threaded right, 14mm CCW or Negative threading GO FOR IT.

I can't take the flash hider off...

"A local Outlawz guy told me that I could get a barrel extention to go over my m4's flash hider that I can't take off."

And the thing says it has an adapter...
But I don't know if its supposed to go on threading or not...

It should come off, Sometimes the outerbarrels are in split sections. Or your orange flash hider is glued on.

The outlawz told me it was hot glued on, thus impossible to melt off or something...
But thats not what i asked.
I asked does it use threading or can it go over the m4 flashhider

Nevermind.
Found out on ASGI
Mods you can close this thread now!