The Faxon Duty Series Threaded Barrel for Glock G17 Gen 5 delivers rugged hard-use reliability with suppressor-ready versatility in a full-size drop-in upgrade. Built from stress-relieved 416-R stainless steel with a full salt bath nitride finish inside and out for maximum corrosion resistance and durability this barrel is engineered for demanding duty competition training or defensive applications where dependability and accessory compatibility matter most.