The Faxon Firearms is proud to partner with Q on the development of barrels for their revolutionary new round 8.6 Blackout. With barrels employing a 1:3 twist rate 8.6 BLK channels rotational energy to increase energy on-target. 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.