Faxon Firearms Match 8.6mm BLK Rifle Barrel 16inch Carbine Length 1-3 Twist Big Gunner Bead Blasted. 6 Blackout (8.6 BLK). With barrels employing an impressive 1:3 twist rate 8.6 BLK channels rotational energy to increase energy on-target. As with all Faxon Barrels these 8.6 BLK barrels are machined from raw bar stock in our greater Cincinnati Facility. Faxon 8.6 BLK barrels are fully stress-relieved air-gauge tested Magnetic Particle Inspected and 11-degree target crowned to ensure superior accuracy. Constructed of 4150 CMV each barrel goes through a battery of tests at each operation until finished and final inspected. All Faxon Barrels are individually checked for headspace by precision custom hardened gauges and are backed by the Faxon Lifetime Guarantee. Consumer Note: At the time of release 8.6 BLK is not SAAMI certified. Please use appropriate caution while firing and when using reloaded ammunition. Specifications for Faxon Firearms Match 8.6mm BLK Rifle Barrel: Manufacturer: Faxon Firearms Color: Bead Blasted Caliber: 8.6mm Blackout Barrel Profile: Big Gunner Gas Block Journal Size-Diameter: .875 in Barrel Twist Rate: 1-3 Barrel Material: 416R Stainless Steel Weight: 2.2 lb Gas Block Journal Size-Length: 1.9 in Package Contents: Faxon Firearms Match 8.6 BLK Rifle Barrel Faxon Firearms 10B863C16NGM-HL-5R-NP3: Match 8.6 BLK Rifle Barrel 16inch Carbine Length 1-3 Twist Bead Blasted