Eickhorn bayonet KCB M9 long version, export model for USA.
This bayonet is a variant of the KCB bayonet series from Eickhorn. In 1986, Eickhorn submitted an improved KCB 77 bayonet to the US Army's bayonet tests for the new M9 bayonet.
Eickhorn was unsuccessful in obtaining the M9 bayonet contract.
That is probably why not so many were produced.
​​​​​39 cm.