Faxon Firearms is proud to partner with Q on the development of barrels for their revolutionary new round 8.6 Blackout (8.6 BLK). The 8.6 BLK barrels are machined from raw bar stock fully stress-relieved air-gauge tested Magnetic Particle Inspected and 11-degree target crown to ensure superior accuracy. Features button rifling; Big Gunner profile; pistol barrel gas system; Salt Bath Nitride inside and outside finish; M18x1.5 thread tapered shoulder (adapter included); 11 degree target crowned; 1.9″ gas block journal; standard DPMS Gen 1 .308 Extension Black Oxide barrel extension.