Unlock precision and reliability with the Faxon Duty Series 5.56 Barrel 16" Black Nitride for AR15/M16. Crafted from durable 4150 mil-spec steel this barrel undergoes a stringent testing process to ensure exceptional performance. Featuring a lightweight pencil profile mid-length gas system and a tough QPQ Black Nitride finish inside and out it is built for endurance and accuracy. The 1:8 twist 11-degree target crown and button rifling allow superior bullet stability for precision shooting. Includes a 1.1" gas block journal M4 barrel extension and 1/2"-28 threading for reliable fit and versatility. Exceptional craftsmanship for your AR15 build.