Add suppressor capabilities to your Echelon 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 come with an included thread protector when a muzzle device is not in use. Product Features For use in any 4.5" Echelon pistol configuration. Product Specifications Caliber: 9mm Twist Rate: 1:10 Length: 5.28" Weight: 4.04 oz Thread Size: .5 x 28