ISO 18" 5.56 AR barrel with rifle length gas system

[HRnightmare]

I am looking for an 18" or 20"AR barrel that accepts a rifle length gas system and accepts an A2 sight post (.750")?

Any suggestions. Just a fun gun so not looking for anything specific.

 

[crazysccrmd]

AR15 Performance has what you're looking for. You'll be hard pressed to get a better quality or more accurate barrel at the price.

http://www.ar15performance.com/barrels?cmx=11562&start=0