The kukris worn and used by serving Gurkhas in Borneo were issued, therefore they had a serial number stamped on them. Very difficult to get hold of one, for obvious reasons, as they are effectively in the same bracket as guns.
Not as good as a machete for slashing through secondary jungle so they carried those as well.
plus an Armalite
plus God knows how much ammo
plus a thundering great big rucksack with motor barrels and/or bombs
plus a big smile
sometimes holding a baby gibbon.