Yes, we do flute Proof carbon fiber barrels. Currently, iota only accepts barrels that are not attached to the receiver. When sending in your barrel please make sure that it is not attached to a receiver or an upper as we will not accept barrels in those configurations. Fluting orders will only be accepted within the continental USA and pricing includes return shipment. iota is not responsible for any changes in accuracy after the barrel has been fluted. Depending on the quality of barrel fluting may or may not have an effect on the rifle platform. iota is also not responsible for surface scratches to the finish or coating of the barrel. Various coatings have various strengths and will hold up differently to the machining process.