The Proof Research AR-Style Barrel in 6mm ARC offers unmatched performance with its innovative carbon fiber wrapping. At 18 inches long this barrel combines a full-profile match-grade 416R stainless steel core with aerospace-grade carbon fiber resulting in a lightweight yet robust design. Its unique composition enhances heat dissipation ensuring consistent accuracy even in the most challenging conditions. With a 1:7.50" twist rate and rifle-length configuration this barrel is crafted for precision shooting offering unparalleled strength and accuracy in a reduced weight profile. Ideal for those seeking reliability and performance in demanding environments.