Faxon Firearms GA910N19NGQ-T: Faxon\'s Duty Series Pistol Barrels for G19/Glock 19 are machined from stress-relieved 4150 CMV steel. The barrels are given a black Nitride 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. Features button rifling, fully stress relieved; Salt Bath Nitride inside and outside finish; 1/2\"-28 thread and 11 degree target crowned.