Here are some 9mm x 19mm Parabellum storage boxes and trays. These are designed to be able to arrange large amounts of bulk 9mm ammo into either a 50Cal or 30Cal standard ammo boxes. I designed one model so that three boxes and 12 trays can be stored in a 50Cal box, and an the other model can be used to store two boxes and 8 trays inside a 30Cal box. Refer to the PDF files for more details.
These boxes use my 22LR boxes as a base and therefore are compatible with my 22LR trays.
The author marked this model as their own original creation.