Faxon Firearms Duty Series Sig P320 Compact 9mm Luger Threaded Pistol Barrel 4.6in 1-10 Twist Black. These barrels are then given a black Nitride or PVD coating to increase lubricity barrel life and resistance to surface wear. All barrels are conventionally rifled to allow a wider range of ammunition to be used including cast lead. The barrels drop into factory-spec slides with no gunsmithing required. Better-than-factory tolerances ensure a consistent tighter lockup than OEM. Specifications for Faxon Firearms Duty Series Sig P320 Compact 9mm Luger Threaded Pistol Barrel: Manufacturer: Faxon Firearms Color: Black Fabric/Material: 416R Stainless Steel Barrel Length: 4.6 in Barrel Twist Rate: 1-10 Flutes: No Caliber: 9mm Luger Barrel Material: 416R Stainless Steel Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Compact Condition: New Package Contents: Faxon Firearms Duty Series Sig P320 Compact 9mm Luger Threaded Pistol Barrel What firearm models does the manufacturer say Faxon Firearms Duty Series Sig P320 Compact 9mm Luger Threaded Pistol Barrel is compatible with? The manufacturer says that Faxon Firearms Duty Series Sig P320 Compact 9mm Luger Threaded Pistol Barrel is compatible with SIG Sauer P320 CompactFaxon Firearms 320A910NCNOQ-T: Duty Series Sig P320 Compact 9mm Luger Threaded Pistol Barrel 4.6in 1-10 Twist Black