Faxon Firearms Match Series Barrel Features The Faxon Firearms Match Series barrel is machined in-house from gun-barrel-quality bar stock starting with 416-R stainless steel that is nitride treated inside and out for improved barrel life and corrosion resistance. The 5R rifling geometry places lands opposite grooves rather than opposite lands which reduces the sharp angles that deform bullet jackets meaning cleaner cycling and better velocity retention downrange. A target crown protects the muzzle from dings that can throw off accuracy and the 1:10 twist rate is matched to common 9mm bullet weights for stable flight. This combination gives P365 XL shooters a duty-grade upgrade without any custom fitting. The barrel extension carries a Nickel Teflon coating that maintains dry lubricity and corrosion resistance while also tightening the fit between extension and slide which translates to a more consistent lockup and repeatable accuracy shot after shot. Straight fluting removes unnecessary mass for a lighter faster-handling pistol while increasing surface area for cooling during extended range sessions. The barrel drops into a factory-spec slide with no gunsmithing required and the threaded 1/2x28 muzzle is ready for a suppressor or Faxon s own EXOS-525 compensator. Backed by Faxon s Lifetime Guarantee it is built for competition shooters and daily carry users alike. Faxon Firearms Match Series Barrel Specifications Brand: Faxon Firearms Model: Match Series Compatible Hosts: Sig Sauer P365 XL Caliber: 9mm Luger Barrel Length: 4.3 Barrel Material: Stainless Steel Barrel Finish: Black Nitride Barrel Description: Fluted Threaded Twist Rate: 1:10 Thread Pattern: 1/2x28 Available At: GrabAGun