I looked at these at the Harrisburg show last year. They are expensive, but light as sin. Just the thing to carry when you are hunting goats or sheep out west. I think the model I looked at is called the "carbon hunter." It retailed for $1895. Here is their website: http://www.christensenarms.com/rifles.html
didn't they gave a problem at one point with delamination between the carbon and the barrel? When I looked into them sometime back that seemed to be the biggest complaint I heard and read. A buddy has the base model and it's super sweet. I have been considering one for years but I never stuck my hand in my pocket that deep. If I had that type of money to spend I wouldn't hesitate at all to buy one.
I have one in 223 rem. I was stationed in california and hunted coyotes and ground squirrels alot, super accurate, light weight, heat has no effect on the barrel since it does not get hot at all. I love it and would consider another one however I am now married and the price is steep which is the only downfall.
If you got all that extra cash laying around, spend it but the bottom line is unless your into .1 inch benchrest or score shooting with a .30 BR or 1000 yard shooting there's no need in the hunting world to spend that type of cash. We're not shooting at targets that small..any old off the shelf varmint rifle and even most of the standard weight bolts today will more than get the job done..BIG GREEN offered a factory version of this barrel a few years back, it went no where but off the shelf..forever!!
other than being lightweight there isnt any advantage. you cant feel the heat after a few shots, but the inner barrel tube is still getting hot. you would be basically paying for the carbon fiber, just as any other carbon fiber product. not saying they are bad, just not any better than any other rifle, custom or not.
I haven't had any luck with these rifles. I think that there are other rifles that are better for the price. McWhorter makes a great rifle for the same price range as the full custom gun Christensen makes.