The Deadlywind Fibur carbon fiber barrels are ultra-lightweight, accurate, and quiet. They are compatible with the Freak(tm) replaceable inserts, so one barrel and a few inserts will do the job of multiple barrels.
Weighing in at an average 46grams (59 grams with insert), the Fibur is 2x to 4x lighter than other replaceable insert barrels.
Unlike other carbon fiber barrels, the Fibur barrel is built with a unique 3 layer construction. 2x2 satin Twill external, uni-direction fibers laid up in a strong multi-vector pattern, and then a super slick "Silkfiber" inside that can be safely swabbed. CNC align-bored segment for the insert area, CNC-ported with 3 rows of straight ports, and then hand-assembled and quality checked-- You can't get any more accurate.
Already have inserts? Just buy the barrel by itself. Need an insert to go with it? Buy one or go with the 3x inserts and save!