Springfield XD-M Threaded Barrel, 10MM, Fits XD-M 10MM, 4.5, Melonite Finish, Black XDM1045TB-KIT Designed for factory fitment" the 9mm" 10mm and .45 ACP threaded barrels for the XD-M 4.5" model are hammer forged and finished in Melonite for unmatched durability. A thread protector is included for when a muzzle device is not present