Faxon Firearms Match Series, 1:10 Twist Barrel, 3.7 Long, 9MM, For Sig Sauer P365, Threaded 1/2x28, Straight Fluted, Nitride Finish, Black 365B910NFSOQ-T Faxon's Match Series pistol barrels for SIG P365 are machined in-house from stress-relieved 416-R stainless steel. These barrels are then given a black Nitride or PVD coating to increase lubricity, barrel life, and resistance to surface wear. All barrels are conventionally rifled to allow a wider range of ammunition to be used, including cast lead. The barrels drop into factory-spec slides with no gunsmithing required. Better-than-factory tolerances ensure a consistent, tighter lockup than OEM.