Ed Brown Products Threaded Barrel 5.035in Glock 17 9mm Luger 1/2x28 Thread 1-16 Twist 416R Stainless Titanium Nitride. Customized with our own Ed Brown Tread Flutes. Designed for a drop-in fit in Gen4 Glocks and threaded for use with a suppressor or other device. Precision machined from 416 stainless steel our premium quality Glock 17 9mm barrel is manufactured for a tighter fit improved lockup and greater accuracy. Customized with our own Ed Brown Tread Flutes. Designed for a drop-in fit in Gen4 Glocks and threaded for use with a suppressor or other device. Features of Ed Brown Products Glock 17 Threaded Barrel Thread size is 1/2 x 28 tpi RH. Overall length from back of hood to end of threaded barrel: 5.035?. Twist rate: 1-16 LH. Thread protector included. Package Contents: Ed Brown Products Glock 17 Threaded Barrel 1 x Thread Protector What firearm models does the manufacturer say Ed Brown Products Glock 17 Threaded Barrel is compatible with? The manufacturer says that Ed Brown Products Glock 17 Threaded Barrel is compatible with Glock 17Ed Brown Products GL-G17-SR-9-GLD: Threaded Barrel Glock 17l 9mm Threaded Titanium Nitride