Hi,the recent threads discussing aspects of AR's with 20" barrels coupled with a few YouTube videos,made me curious about this configuration.Where most everyone seems to want an AR with a short and still shorter barrel,the 20" endures.For the members that favor the full size rifle,would you please tell me what you like about it,your application and how you have the rifle configured?I haven't owned an AR in a long time,but this may soon change.Thanks as always.