Sword bayonet

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A sword bayonet is any long, knife-bladed bayonet designed for mounting on a musket or rifle. Its use is thought to have begun in the 18th century and to have reached its height of popularity throughout the 19th and into the early 20th centuries. When unmounted from a musket or rifle, sword bayonets with their typical hilts and long blades also could be wielded as short swords. While modern military bayonets typically have knife blades, they are usually too short to be called sword bayonets and are more akin to fighting/utility knives.