The Faxon Duty Series P365 XL 9mm barrel is a drop-in replacement for the factory barrel in SIG Sauer P365 XL slides (brand part no. 365A910NXNOQ-N). It is machined from stress-relieved 4150 CMV, button rifled and salt-bath nitrided inside and out. The OEM-style profile and non-threaded muzzle keep it the same shape as stock. Faxon Firearms makes it in Greater Cincinnati, Ohio, for shooters who want a fresh barrel in a carry pistol.

Key Specifications

• The barrel is chambered in 9mm Luger (9×19), cut to SAAMI chamber specification.
• It is 4150 CMV steel, stress relieved before it is cut to length.
• Barrel length is 3.69 inches to match the P365 XL.
• Rifling is a 1:10 twist with six grooves, button rifled in a land-and-groove form.
• Finish is salt-bath QPQ nitride inside and out for corrosion resistance.
• The muzzle is non-threaded with a target crown.
• The OEM-style profile fits the slide as the factory barrel does.

Frequently Asked Questions

Is this barrel a drop-in for the P365 XL? Yes. It is a direct replacement for the factory barrel in SIG P365 XL slides with no gunsmithing on factory-spec slides. Some aftermarket slides may need minor fitting.

Can I shoot cast lead bullets through it? Yes. Six-groove button rifling is land-and-groove rifling, not polygonal, so it runs both jacketed and cast lead bullets.

Buy the Faxon Duty Series 9mm Barrel for SIG Sauer P365 XL, Non-Threaded, Black Nitride

Explore more handgun barrels like this one. It uses your factory recoil assembly, and the slide and recoil parts are not included. We ship fast from our Lubbock, Texas gun shop.