Killer Innovations Velocity Threaded Pistol Barrel Glock 17 Gen 5 1-10 Twist 1/2 x 28 Thread MDC Gray. Every barrel is machined with an 11 target crown for greater accuracy and coated with high quality finishes ensuring the most accurate reliable barrels available on the market today. These are our Mod 2 barrels with the Threaded versions made to pair perfectly with our Velocity Glock Compensator. Specifications for Killer Innovations Velocity For Glock Threaded Pistol Barrel: Manufacturer: Killer Innovations Fabric/Material: 416R Barrel Length: 4.97 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-10 Flutes: No Caliber: 9mm Luger Barrel Material: 416R Stainless Steel Gun Make: Glock Gun Model: Glock 17 Gen 5 Model Generation: 5 Weight: 3.8 oz Condition: New Gun Frame Size: Full Size Country of Origin: USA Features of Killer Innovations Velocity For Glock Threaded Pistol Barrel Compatible with Glock 17 Gen 5 Weight: 3.8 oz w/o Thread Protector Length: 4.973'' AOL w/o Thread Protector Threads: 1/2 x 28 Package Contents: Killer Innovations Velocity For Glock Threaded Pistol Barrel Thread Protector High Temp Rubber O Ring What firearm models does the manufacturer say Killer Innovations Velocity For Glock Threaded Pistol Barrel is compatible with? The manufacturer says that Killer Innovations Velocity For Glock Threaded Pistol Barrel is compatible with Glock 17 Gen 5Killer Innovations GLKBT377GRY: Velocity Threaded Pistol Barrel Glock 17 Gen 5 1-10 Twist 1/2 x 28 Thread MDC Gray