Faxon's Match Series Pistol Barrels for Glock 19 are machined 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. Product Description Caliber: 9mm Luger Firearm Fit: Handgun Color: Black Nitride Material: Stainless Steel Barrel Type: Button Rifled Twist: 1:10" Style: Drop-In Compatible With: Glock 19 Gen2-5 Thread Pattern: 1 / 2"x28 Barrel Description: Flame Fluted