The Rival Arms RA20G201A Precision Drop-In Barrel for Glock 19 Gen3-4 delivers match-grade performance in a rugged, drop-in design. Crafted from CNC-machined 416R stainless steel and precision-polished, this 4.02" barrel features a 1:10 twist with six-groove rifling to optimize stability and accuracy across a broad range of 9mm Luger loads. Finished in a durable black PVD coating, it provides excellent corrosion resistance and wear protection while maintaining a clean, low-profile look. The BORSLICK Boron Nitride DCD inner bore treatment minimizes heat and carbon buildup, helping sustain consistency shot after shot, and the target crowned muzzle enhances precision at distance. Each RA20G201A is individually hand inspected for accuracy, ensuring you receive a barrel that meets Rival Arms stringent standards without the need for gunsmithing. With a reliable, drop-in fit for Glock 19 Gen3-4 pistols, this barrel is designed to enhance performance in competition or duty scenarios, delivering outstanding precision, durability, and longevity. Built to withstand harsh environments and demanding use, its a proven upgrade for shooters who demand top-tier accuracy and repeatable results from every session.