SilencerCo Threaded Barrels: Beretta, Glock, H&K, and more...
Glock Barrel
Zev Glock 19 Gen 1-5 9mm Pro Match Grade Barrel in PVD Bronze Non-Threaded
Amazon.com : Lethal-Eye Glock Barrel Thread Protector 1/2x28 Black 9mm 357 Sig 11mm Length, fits Lone Wolf and Other Threaded Barrels : Sports & Outdoors
Double Diamond Standard Replacement Barrel | Best Glock Accessories