Zaffiri Precision Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel 4.37in 1-10 RH Twist PVD Gold. Machined from 416R stainless steel these barrels are built for consistent fitment and dependable operation with standard components. The top port design works in conjunction with compatible slide windows to create a clean functional ported configuration while straight fluting adds a distinctive look. A great choice whether you're upgrading a factory Glock pistol or building a custom clone using compatible Zaffiri Precision components. Specifications for Zaffiri Precision Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel: Manufacturer: Zaffiri Precision Fabric/Material: 416R Stainless Steel Caliber: 9mm Luger Gun Make: Glock Gun Model: Glock 17 Gen 4 Glock 17 Gen 3 Barrel Length: 4.37 in Threads per Inch: None Barrel Twist Rate: 1-10 RH Gun Type: Pistol Features of Zaffiri Precision Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel Top port design vents gases upward Ported design helps reduce muzzle rise and felt recoil Straight fluting adds a distinctive appearance Compatible with Zaffiri Precision ZPS.3 and legacy ZPS.6 slides Port alignment and function are only guaranteed with compatible ported slide models Designed for consistent fitment with OEM and compatible aftermarket components Conventional rifling compatible with a wide range of ammunition types Designed for drop-in installation Package Contents: Zaffiri Precision Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel What firearm models does the manufacturer say Zaffiri Precision Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel is compatible with? The manufacturer suggests that Zaffiri Precision Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel is compatible with Glock 17 Gen 3 Glock 17 Gen 4Zaffiri Precision BA-G17G14-TP-GLD: Top Ported Glock 17 Gen 3 Glock 17 Gen 4 9mm Luger Non-Threaded Pistol Barrel 4.37in 1-10 RH Twist PVD Gold