Add suppressor capabilities to your Echelon pistol with a factory threaded drop-in barrel. 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.