Springfield Armory Echelon Replacement Barrel 4.50in Threaded Black Melonite Stainless Steel Fits Springfield Echelon. 9mm this threaded barrel features a black Melonite coating for rust-resistance and lubricity. The barrel comes with an included thread protector when a muzzle device is not in use. For use in any 4.5" Echelon pistol configuration. Sales of threaded barrels are restricted and/or prohibited in the following states: CA CT DC IL MA NY WA. Please check your state and local regulations regarding restrictions. Specifications for Springfield Armory Echelon Replacement 4.50in Threaded Barrel: Manufacturer: Springfield Armory Color: Melonite Additional Features: Threaded 1-10in. Twist Package Contents: Springfield Armory Echelon Replacement 4.50in Threaded Barrel Springfield Armory EC0901TB Echelon Replacement Barrel 4.50 Threaded Black Mel