Bryan, this is a replacement barrel for the 4.5" XD-M or XD-M Elite pistol configuration, in case you want to upgrade your pistol to be suppressor ready.
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.
For use in any 4.5" XD-M or XD-M Elite pistol configuration.
Stay safe & have a great day!

Bryan, this is compatible with any 4.5 inch XD-M model firearm in 45ACP. This is a threaded barrel for adding a suppressor/muzzle device. So it'll just be a little longer than the original barrel because of the threads. Hope this helps.

Hi Bryan and welcome. This is this a longer replacement for the 4.5. Cheers and stay safe!