The arquebus (sometimes spelle harquebus, harkbus or hackbut; from Dutch haakbus, meaning "hook gun") is an early muzzle-loaded firearm used in the 15th to 17th centuries. In distinction from its predecessor, the hand cannon, it has a matchlock. Like its successor, the musket, it is a smoothbore firearm, but it is lighter and easier to carry. It is a forerunner of the rifle and other longarm firearms.