This 9mm Barrel fits the GLOCK 19. It is Skillfully Machined to EXTREMELY Tight Tolerances from US made, 416 Stainless Steel. Once it has been Machined we have all of our Barrels HEAT TREATED. This makes them Much, Much Stronger. Our Barrels are Accurate with 10:1 Rifling and Dependable Match Grade Chamber. So if your Replacing a Barrel or need one for that Custom Build this is the Barrel you want when you light the fuse on that Controlled Explosion in your hand!