I have purchased two. The objective is less weight for a given outside diameter. My last one was a full Sendero diameter for a little more stiffness.
Once I purchased two 26" barrels at the same time. The carbon fiber wrapped was a Sendero light profile while the other was a copy of the six lug Weatherby ultralight 24" with 2" added to its length. The stainless barrel was heavily fluted by Twisted Barrel. Both weighed forty ounces.