The Rival Arms RA20G102A Precision Drop-In Barrel for Glock 17 Gen3-4 in 9mm Luger delivers match-grade accuracy through a meticulously engineered 4.49" threaded barrel crafted from 416R stainless steel with a low-temperature vacuum PVD finish and 1/2-28 compatibility for after-market suppressors and compensators. This CNC-machined billet construction provides superior corrosion resistance and durability, while the 1:10 twist with six-groove rifling and a BORSLICK Boron Nitride DCD inner bore treatment resist heat and carbon buildup to maintain consistent accuracy round after round. A target crowned muzzle ensures optimal bullet release, and every RA20G102A is individually hand inspected for precision out of the box with no gunsmith required for installation. Designed to fit Glock 17 models, this threaded barrel pairs reliability with enhanced performance in varied environments, supported by a limited lifetime warranty. Trust Rival Arms to bring your Glock platform closer to custom precision with a drop-in solution that enhances accuracy, durability, and versatility without compromising your pistols balance or handling.