ZEV Technologies Glock 17 Gen 5 9mm Luger Optimized Match Non-Threaded Pistol Barrel 1-14 Twist Black DLC. ZEVs proprietary broach cut 1 in 14'' left hand twist rifling was developed to create the most accurate Glock aftermarket barrel available and testing confirms a significant increase in accuracy over factory barrels in all standard bullet weights. Manufactured from 416R stainless steel which is an ideal material for making match grade barrels because the material allows for the precise cutting of chambers and rifling which results in a more accurate barrel. Specifications for ZEV Technologies Glock 17 9mm Luger Optimized Match Non-Threaded Pistol Barrel: Manufacturer: ZEV Technologies Fabric/Material: Stainless Steel Caliber: 9mm Luger Gun Make: Glock Barrel Twist Rate: 1-14 Condition: New Features of ZEV Technologies Glock 17 9mm Luger Optimized Match Non-Threaded Pistol Barrel Match Grade drop in barrel 1-14'' twist rate SAAMI spec. Match chambers Package Contents: ZEV Technologies Glock 17 9mm Luger Optimized Match Non-Threaded Pistol Barrel What firearm models does the manufacturer say ZEV Technologies Glock 17 9mm Luger Optimized Match Non-Threaded Pistol Barrel is compatible with? The manufacturer says that ZEV Technologies Glock 17 9mm Luger Optimized Match Non-Threaded Pistol Barrel is compatible with Glock 17 Glock 17 Gen 5ZEV Technologies BBL-17-OPT-5G-DLC: Glock 17 Gen 5 9mm Luger Optimized Match Non-Threaded Pistol Barrel 1-14 Twist Black DLC