The Faxon Firearms 6.5 Creedmoor Heavy Fluted Barrel is manufactured from triple stress-relieved 416R stainless steel with straight flutes machined into the exterior surface. Fluting reduces weight while actually adding to the stiffness of the barrel and providing enhanced cooling properties to resist distortion of the barrel as it heats up. We put each 6.5 Creedmoor Heavy Fluted Barrel through a battery of tests, including Magnetic Particle Inspection (MPI) to ensure the barrel you install on your rifle is free of hidden flaws that could compromise accuracy or service life. Each 6.5 Creedmoor Heavy Fluted Barrel is button rifled with a 5R pattern and 1-8 twist to impart excellent stability to the 6.5 Creedmoor bullet; makes cleaning easier, too. Unlike traditional rifling, 5R rifling has lands offset over grooves, meaning the bullet is not distorted as if travels down the barrel.Specifications:Barrel Material: 416-RBarrel Type: 5R Button RifledBarrel Caliber: 6.5 CreedmoorBarrel Twist: 1:8Barrel Length: 24Barrel Profile: Heavy FlutedBarrel Gas System: RifleInside Finish: Salt Bath NitrideOutside Finish: Salt Bath NitrideMuzzle Thread: 5/8-24 TPIGas Block Diameter: .750Gas Block Journal Length: 1.1Barrel Extension: DPMS LR-308 Compatible - Nickel Teflon CoatedBarrel Weight: 2.85lbsMagnetic Particle Inspected!Polished 11-degree Target Crown