"Faxon Firearms Duty Series AR15 Barrel 9mm 1:10 Twist 4150 Nitride - 16"" | Light Tapered Profile | Blowback"

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"Quality is imbued into our barrels from the start. We start with the best materials, either certified 4150 Mil-Spec steel or 416-R Stainless. 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.  Technical Specifications Barrel Material: 4150 Barrel Type: Button Rifled  Barrel Caliber: 9mm SAMMI  Barrel Twist: 1:10 Barrel Length: 16"" Barrel Profile: Pistol Caliber Taper Barrel Gas System: Blowback Inside Finish: Nitride Outside Finish: Nitride Muzzle Thread: 1/2-28 TPI (Threads Per Inch) Barrel Extension: Colt & Glock Compatible Feed Ramps Weight: 1.34 lbs 11-degree Target Crown *Note - Faxon Firearms advertises its barrels by their legal length. Pistol Caliber Carbine barrels have the chamber built into the barrel ""extension"" area, which makes them about ~1"" shorter than centerfire rifle barrels. "