Want to upgrade your 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 barrels come with included muzzle caps to protect the threads when not in use. Product Features 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. Product Specifications Finish: Melonite Twist Rate: 1:10 Length: 5.28" Weight: 4.04 oz Thread Size: .5x28