A device arranged to enable the engagement of targets (5) by means of a
shaped charge function. An ammunition unit is arranged to operate with at least
two configuration modes where in the first mode the ammunition unit comprises solely
a first modular charge (3). In the second mode the first modular charge
is conjoined with a second modular charge (4). The modular charges each
effect their own type of shaped charge function. Another feature is that the ammunition
unit is arranged to enable changeover from the first configuration to the second
before firing, launch or release of the ammunition unit.