A valve assembly includes a valve housing. Four less than lethal cartridges are attached to the multiple cartridge assembly and arranged to correspond with the breech of a four barrel less than lethal gun. In a step of making the stack body, cavities are formed in the stack body. Thus, in this manner, a separate buffer memory is described for data accesses, and thus the content of the buffer for command accesses is not overwritten or destroyed when data accesses occur during the program execution.