Dagger is a stabbing weapon, which is very much like a short sword, it’s double-edged. Daggers can also be something like a timber placed diagonally at a ship’s frame. While on the other hand, a bayonet was used for military purposes. It used a pointed instrument, much a like a dagger, attached to the muzzle of rifle. This weapon was handy for both offence and defense for the soldiers. So, a bayonet dagger is simply a dagger used as an extension for a musket or rifle. At KASwords, we have a nice collection of such historical daggers!