Rosco Manufacturing Bloodline Glock 17 Barrel 9mm 4.5in Pistol 1-10 Twist Non-Threaded Melonite Black Black Nitride. All Bloodline Glock barrels are made from 416R stainless steel broached honed polished and then melonited. All barrels have also been designed with strategic beveled edges surrounding the chamber area to reduce premature wear/ tear commonly found on basic aftermarket barrels. The result is a duty capable upgrade that will not sacrifice quality. Drop a Bloodline in your Glock to experience true PERFECTION at a price that will leave you room for plenty of ammo. Specifications for Rosco Manufacturing Bloodline Glock Barrel: Manufacturer: Rosco Manufacturing Color: Black Finish: Melonited Fabric/Material: Stainless Steel Caliber: 9mm Luger Gun Make: Glock Barrel Material: 416R Stainless Steel Barrel Twist Rate: 1-10 Flutes: No Weight: 0.5 lb Country of Origin: USA Features of Rosco Manufacturing Bloodline Glock 19 Barrel Barrel Crown Recessed with a 50/50 surface split Rifling Pulled broach Package Contents: Rosco Manufacturing Bloodline Glock Barrel What firearm models does the manufacturer say Rosco Manufacturing Bloodline Glock Barrel is compatible with? The manufacturer suggests that Rosco Manufacturing Bloodline Glock Barrel is compatible with Glock 43X Glock 19 Glock 17Rosco Manufacturing BL-G17-9mm-M-STD: Bloodline Glock 17 Barrel 9mm 4.5in Pistol 1-10 Twist Non-Threaded Melonite Black Black Nitride