SIG SAUER P365XL 9mm Luger Non-Threaded Pistol Barrel 3.7in Nitron Black. Features the factory loaded chamber indicator (LCI) witness hole. Specifications for SIG SAUER P365XL 9mm Luger Non-Threaded Pistol Barrel: Manufacturer: SIG SAUER Fabric/Material: Carbon Steel Caliber: 9mm Luger Gun Make: SIG Sauer Gun Model: SIG Sauer P365 XL Barrel Length: 3.7 in Barrel Material: Carbon Steel Threads per Inch: Non Threaded Package Contents: SIG SAUER P365XL 9mm Luger Non-Threaded Pistol Barrel SIG SAUER Infinite Guarantee What firearm models does the manufacturer say SIG SAUER P365XL 9mm Luger Non-Threaded Pistol Barrel is compatible with? The manufacturer says that SIG SAUER P365XL 9mm Luger Non-Threaded Pistol Barrel is compatible with SIG Sauer P365 XLSIG SAUER 8900740: P365XL 9mm Luger Non-Threaded Pistol Barrel 3.7in Nitron Black