With one of the most advanced barrels out there, you probably assume there is a secret to the formula.There is no secret to this process.We gun drill each barrel individually with proper bearing honing guides, back-taper and nose geometry drills that gaurantee a straight, true precision hole, part after part.Even after using the honings pads on the gundrill, we use a roller burnishing process that smooths the highs into the lows for a work hardened 8 micron finish. Employing innovative technologies to ensure the integrity of each product before it leaves Their shop is the core of Live Free Armory's manufacturing.Specifications for Live Free Armory LF19 1/2x28 Threaded Barrel for Glock 19:Manufacturer:Live Free ArmoryColor:Black NitrideFabric/Material:416 Stainless SteelBarrel Length:4.43 inThreads per Inch:1/2x28Cartridge:9mm LugerGun Make:GlockGun Model:Glock 19Model Generation:3, 2, 1Weight:0.5 lbCondition:NewCountry of Origin:USAFeatures of Live Free Armory LF19 1/2x28 Threaded Barrel for Glock 19Chambered in 9mm and compatible with the Glock 19 Gen 1-3 only.Thread pitch is 1/2x28Thread protector is not included.Package Contents:Live Free Armory LF19 1/2x28 Threaded Barrel for Glock 19Live Free Armory G3B19T74116F: LF19 Threaded Barrel, Glock 19, 9mm, 1/2x28tpi, Black Nitride