SIG SAUER Pistol Barrel P320 9 mm 5.5in Threaded Black. 4.7in long. SIG SAUER factory replacement pistol barrels are specially heat-treated for toughness and durability. Specifications for SIG SAUER P320 9 mm 5.5in Pistol Barrels - Threaded: Manufacturer: SIG SAUER Color: Black Barrel Length: 5.5 in Threads per Inch: 1/2x28 Caliber: 9mm Luger Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Full Size SIG Sauer P250 Condition: New Package Contents: SIG SAUER P320 9 mm 5.5in Pistol Barrels - Threaded SIG SAUER Infinite Guarantee What firearm models does the manufacturer say SIG SAUER P320 9 mm 5.5in Pistol Barrels - Threaded is compatible with? The manufacturer suggests that SIG SAUER P320 9 mm 5.5in Pistol Barrels - Threaded is compatible with SIG Sauer P250 SIG Sauer P320 Full SizeSIG SAUER 8900443: Pistol Barrel P320 9 mm 5.5in Threaded Black