Nowadays, unmanned systems are widely used in many applications, including military applications, such as Unmanned Grounded Vehicles (UGVs), Unmanned Marine Vehicles (UMVs), and Unmanned Aerial Vehicles (UAVs). Small UAVs can be used to cost enemies high losses, as they are used against vital targets such as fuel tanks, ammunition and weapon inventories, radar antennas, etc. Arming small UAVs would require lighter payload than usual. Therefore, using light-weight 3d-printed aerial bombs can be preferred. In this paper, a 3d-printed aerial bomb has been designed, numerically modelled and manufactured. The numerical model includes stress analysis of the bomb body during flight, stability and trajectory calculations by using PRODAS software. Bomb body has been 3d-printed by using PLA material, and filled with steel balls to make fragmentation effect of the bomb. It was found that the new design is considerably less weight, cheaper, and easier in production compared to traditional steel bombs. Moreover, the design can be easily amended to manufacture variant-caliber bombs with no need to production of new dies/jigs/fixtures or implementation of new production procedure that are required in production of traditional bombs.