09-30-2011, 02:44 AM
I know both companies that do carbon fiber barrels (including Christensen) were offering a service to turn down and wrap your barrel not too long ago, I assume they still do. I know a gunsmith that buys barrels from Christensen and threads and chambers them for his custom lightweight rifles. They use Shilen blanks, or used to. I don't know about an existing AR barrel though, since the gas port would already be drilled?