G&G CM16 gbbr
 

Hi. I have a G&G CM16 GBBR. I would like to change the outer barrel to something like this http://www.evike.com/products/33873/. Is this possible or do you a have suggestion?

Should be fine. I think any outer barrel mods require you to expand the hole of the outer barrel retainer nut (the new outer is much wider than the stock)

There are a bunch of vids on youtube where they do this.

Hth,
good luck

Yup you can do that.