The term "rifle-musket" originally referred to muskets with the smooth-bored barrels replaced with rifled barrels. The length of the barrels were unchanged, allowing the weapons to be fired by rank, since a long rifle was necessary to enable the muzzles of the second rank of soldiers to project beyond the faces of the men in front. The weapon would also be sufficiently long when fitted with a bayonet to be effective against cavalry. Such weapons manufactured with rifled barrels, muzzle loading, single shot, and utilizing the same firing mechanism, also came to be called rifle-muskets.