A seeking fused munition (10), which at the front end thereof, has a projectile-forming insert (12). In order to define an optimally effective projectile-forming insert (12), even in a configuration of relatively small caliber, the seeking fused munition (10) is of a full-caliber configuration without a casing. A tail portion (24) is provided at the rear end of the seeking fused munition (10). The tail portion (24) is connected to the seeking fused munition (10) along a peripherally extending specified rupture portion (26).