Shaw Barrels Barrel Features The Shaw Barrels Barrel is machined from 416R stainless steel a premium barrel steel prized for its corrosion resistance and ability to hold tight tolerances through repeated firing. The black Melonite finish adds a hard low-friction surface treatment that improves wear resistance and reduces fouling buildup inside the bore. Spiral fluting cut along the barrel s exterior trims weight while leaving extra material for heat dissipation compared to a smooth profile of the same diameter. A 1-10 inch twist rate is tuned for standard and heavier 9mm bullet weights giving shooters a versatile match barrel for duty competition or range use. The barrel is a direct drop-in replacement for the Glock 19 19X and 45 across Gen 1 through Gen 5 requiring no fitting or gunsmithing to install. A 1/2x28 muzzle thread with a .400 inch thread length comes factory cut allowing shooters to run a suppressor or compensator without sending the barrel out for additional machine work. The 4.375 inch length keeps the pistol s original balance and holster compatibility intact while delivering a tighter match chamber than the factory barrel. For Glock owners chasing better accuracy and suppressor compatibility in one upgrade this barrel is a dependable choice. Shaw Barrels Barrel Specifications Manufacturer: Shaw Barrels Model: Barrel Compatible Hosts: Glock 19 19X 45 Gen 1-5 Caliber: 9mm Barrel Length: 4.375 Barrel Finish: Black Melonite Material: 416R Stainless Steel Twist Rate: 1:10 Thread Pattern: 1/2x28 Barrel Description: Spiral Fluted Weight: 0.32 lbs Available At: GrabAGun