Add muzzle devices to your Echelon 4.0C pistol with a factory threaded drop-in barrel. Available in 9mm, this threaded barrel features a black Melonite coating for rust-resistance and lubricity. The barrel comes with an included thread protector when not in use.Key FeaturesThreaded Design: Features a 1/2x28 threaded design for compatibility with various muzzle devices.Melonite Coating: The black Melonite coating enhances rust resistance and lubricity.Included Thread Protector: Comes with a thread protector for safeguarding the threads when not in use.CompatibilityFor use in any 4.0" barrel Echelon pistol configuration.