AR-15 gas tube removel?

[pistol-whipped]

MY RRA varmiter has a chrome barrel , I want to put a matte black finish on it. How do I remove the handgaurd/gastube to expose the whole barrel?I have the armourers wrench but skeptical on how to use. Any info would be much appreciated!

 

[UniversalFrost]

check out the link below to the AR15 forum. Plus it has a complete step by step build up/ take down of a complete upper and lower (with pictures for those that don't like to read).

http://www.ar15.com/forums/topic.html?b=3&f=4&t=226782


www.ar15.com/content/guides/
www.ar15.com/content/manuals/
Direct link to the Technical Manual

 

[pistol-whipped]

Holy ca-ca ,that link has every thing I needed to know! Thanks a million!