Springfield Armory Replacement Barrel Features Want to upgrade your Springfield XD-M pistol to be suppressor ready? Then be sure to check out these threaded barrels designed for the XD-M 4.5. These drop-in threaded barrels feature a black Melonite coating for rust-resistance and lubricity. The Replacement Barrel come with included muzzle caps to protect the threads when not in use. For use in any 4.5 XD-M or XD-M Elite pistol configuration. WARNING: Caliber of barrel is intended only for use in the original caliber of the firearm. You cannot change the caliber of your firearm by purchasing one of these barrels. Springfield Armory Replacement Barrel Specifications Brand: Springfield Armory Category: Handgun Barrels Series: Replacement Barrel Model: XD-M Caliber: 45 ACP Color: Black Finish: Melonite Twist: 1:16 Firearm Fit: Springfield XD-M Length: 4.50 Thread Pattern: .578a ^2x28 Weight: 3.66 oz