Bayonets are useful as both tools and close combat weapons, but most require a special type of mount. Oceanykan engineers, facing the logistical nightmare that is local arms supply, have become extremely talented at forging bayonet adapters for any blade and any gun. While not truly universal (in the sense that a single UBA is made for a single weapon and a single type of bayonet), these devices are so easy to make and essentially the same altogether, that they've more than earned their name. Most local blacksmiths or workshops know how to make them for cheap.