Taser cartridges ...
In a previous life, I had part of a contract to supply storage cabinets for a strongroom at the UK Taser agent ... the strongroom was built to store 100,000 spare cartridges. 100,000.
If you are planning to use Taser in situations where a firearm would normally be used, you don't need a stockpile of 100K spare cartridges ... 500 would do it, 1000 tops. 100,000 spare cartridges in stock woudl only be needed if you were planning on zapping a LOT of people.