Product Description The Ruger 90739 Threaded Barrel Kit is a genuine Ruger factory accessory engineered specifically for the Ruger-57 pistol chambered in 5.7x28mm. Measuring 4.49 inches in length, this factory-manufactured stainless steel barrel features a Black Nitride finish for outstanding durability and corrosion resistance. The threaded muzzle accepts any 1/2"-28 (Class 2A) muzzle device, making it perfect for suppressor-ready configurations or other muzzle accessories. Installation requires no gunsmithing and the complete kit includes a thread protector, adapter, and wrench so you can be up and running quickly. Proudly made in the USA, this barrel kit delivers the exact fit and reliable function that Ruger owners expect. Product Highlights Genuine Ruger factory accessory designed for a precise, drop-in fit with the Ruger-57 pistol in 5.7x28mm 4.49-inch stainless steel barrel with Black Nitride finish for superior corrosion and wear resistance Compatible with any 1/2"-28 (Class 2A) muzzle device, including suppressors and muzzle brakes No gunsmithing required for installation; complete kit includes thread protector, adapter, and wrench Made in the USA to Ruger&';s exacting manufacturing standards for optimal performance and reliability Specs Brand: Ruger MPN: 90739 UPC: 736676907397 Caliber: 5.7x28mm Barrel Length: 4.49" Finish: Black Nitride Material: Stainless Steel Thread Pattern: 1/2"-28 (Class 2A) Barrel Features: Threaded Compatibility: Ruger-57 Pistol Sights: None Includes: Thread Protector, Adapter, Wrench Country of Manufacture: USA Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>