Not sure what you are talking about. Smallest ones we ever dropped were 500 pounders and the practice ones were concrete, same size, shape and weight as an actual high explosive weapon. Admittedly, the P-3 not being the most important bomb dropper in the inventory, so I don't know if the pointy nose guys have something like that, but I'm not sure why anyone would be flying around with 100 pound anything. Maybe the T-2s or something. Heck, our some of our sonobuoys weight half that much. some guys use the sonobuoy storage tubes (about 4 feet long and 6 inches in diameter) to fill with sand to weight down the back of a pick up truck in the winter. But, in these post 9/11 days not sure how much surplus/waste military stuff makes it out of the bases.