Owned and operated just outside Atlanta Georgia, True Precision Match barrels are designed and made in specialized factories to the strictest tolerances. Made from US sourced certified 416R Match Grade stainless steel we go above and beyond to broach cut our rifling through a proprietary process that ensures both peak accuracy and reliability. Enhanced rifling techniques, better overall fit, lockup, finish options, and higher quality control standards set our barrels apart from both original OEM designs as well as other aftermarket barrels. Specifications for True Precision Pistol Sig P365 XL Barrel, Threaded: Manufacturer: True Precision Fabric/Material: 416R Stainless Steel Barrel Length: 4.35 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-10 Cartridge: 9mm Luger Barrel Material: 416R Stainless Steel Gun Make: SIG Sauer Gun Model: SIG Sauer P365 XL Weight: 2.7 oz Included Accessories: Standard Condition: New Rifling Profile: 6 Groove Rifling Gun Type: Handgun Features of True Precision Pistol Sig P365 XL Barrel, Threaded: Easy to install drop-in design fits the P365 XL 3.7", XMACRO & Tacops (non-comp versions). NOT for the Spectre Comp which uses a 3.1" barrel. Will not fit the P365 XMACRO Comp compensated slide version that uses a 3.1" barrel. It WILL fit the P365 XMacro & Tacops versions (non-compensated slide). See our other P365 listings for the 3.1in model New for 2023, all P365 models from True Precision will no longer have the LCI peep hole cut on top. This will assist in keeping pistol mounted optics clean and free from powder blowback and debris escaping from a LCI hole.  Threaded barrel length is 4.35" overall. (without thread protector attached); Advanced proprietary broach cut design specifically engineered for increased accuracy potential; Broach cut 6 groove rifling allows for all ammo types to be used safely, including cast lead; 100% manufactured with certified 416R stainless steel; 9mm 1/10RH twist rifling; SAAMI spec chamber.; Weight: 2.7oz without thread protector installed; Improved overall fit from OEM with added chamfers, improved radius cuts, and other additions for a better than OEM barrel; Improved feedramp design over OEM for more reliable feeding of defensive ammo; Lifetime performance warranty on function Package Contents: True Precision Pistol Sig P365 XL Barrel, Threaded Thread Protector Viton O-Ring