Improving shooter accuracy has been a main driver behind Easton archery engineering since the company was founded in 1922. To meet that goal, Easton has developed a proprietary process, Acu-carbon, that is used to fabricate carbon arrows. The Acu-Carbon™ process is a continuous-fed, single-die manufacturing method that produces uniform shafts and eliminates the need for spine and weight sorting that can plague accuracy-seeking archers and bowhunters. Carbon shafts made this way are used throughout the Easton line and are found in products such as 6.5, SONIC, AXIS, FMJ and others.
Click here to see how Easton produces ACU-carbon: https://eastonarchery.com/2022/05/acu-carbon-arrow-construction-how-arrows-are-made/