Faxon Firearms AR 9 Threaded Barrel 10mm Auto 16 inch Light Taper 1-16 Twist No Gas Port 5/8x24 Nitride Black. 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. Specifications for Faxon Firearms Light Tapered AR-15 10mm Threaded Barrel: Manufacturer: Faxon Firearms Color: Black Finish: Nitride Caliber: 10mm Auto Barrel Profile: Light Taper Threads per Inch: 5/8x24 Barrel Twist Rate: 1-16 Gun Model: AR-9 Package Contents: Faxon Firearms Light Tapered AR-15 10mm Threaded Barrel What firearm models does the manufacturer say Faxon Firearms Light Tapered AR-15 10mm Threaded Barrel is compatible with? The manufacturer says that Faxon Firearms Light Tapered AR-15 10mm Threaded Barrel is compatible with AR-9Faxon Firearms 15A1016N16NLQ: AR 9 Threaded Barrel 10mm Auto 16 inch Light Taper 1-16 Twist No Gas Port 5/8x24 Nitride Black