Ed Brown Products Threaded Barrel 5.035in Glock 17 9mm Luger 1/2x28 Thread 1-16 Twist 416R Stainless Titanium Nitride GL-G17-SR-9-GLD. Customized with our own Ed Brown Tread Flutes. Designed for a drop-in fit in Gen4 Glocks and threaded for use with...