Springfield Armory Echelon 4.0C Factory Barrel Black. 0in Factory OEM drop-in barrel is designed to work with any standard configuration Echelon 4.0in 9mm pistol and features a black Melonite finish for rust-resistance and lubricity. This barrel is for any shooter who may have purchased a threaded barrel model Echelon and now wants an original standard factory barrel for their shooting needs. For use in any 4.0in Echelon pistol configuration. Some state restrictions prevent the sale of aftermarket barrels please check your local and state regulations. Not available to CA residents Specifications for Springfield Armory Echelon 4.0C Factory Barrel: Manufacturer: Springfield Armory Color: Black Finish: Melonite Fabric/Material: Steel Caliber: 9mm Luger Gun Make: Springfield Armory Barrel Length: 4 in Barrel Material: Steel Threads per Inch: Non Threaded Rifling Profile: Conventional Package Contents: Springfield Armory Echelon 4.0C Factory Barrel Springfield Armory EC0901C-RET: Echelon 4.0C Factory Barrel Black