Faxon starts with 4150 Mil-Spec steel from there, each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. All barrels are individually checked for headspace by precision custom hardened gauges. Features button rifling; Socom profile; mid barrel gas system; Nitride inside and outside finish; 1/2"-28 thread; 11 degree target crowned; 1.1" gas block journal and M4 barrel extension.

• Length: 16"
• Model: Duty Series
• Twist: 1:8"
• Finish: QPQ Black Nitride
• Barrel Type: Button Rifled

*Item must be returned in unused condition and in the original manufacturer's packaging (if applicable). If an item arrives non-defective and accurate to its description, this guarantee does not apply and returns will not be organized in those situations. Please confirm compatibility and specifications with us regarding item Faxon Firearms Duty Series 5.56x45mm NATO 16" before purchasing if you are unsure.