No horse in the race, but you don't build 1 bullet for every enemy soldier. You might need to fire 10 for each actual kill. Also, as far as I know, don't munitions have a shelf life? So you would need to keep making more anyway.
Traditional MRAAMs are still unavoidably expensive, especially with AESA seekers. Every missile is ultimately a full standalone unmanned aircraft with onboard navigation, autopilot, seeker/fuzing(fire control), comms and engine.
But overall this is a big deal, because for that very reason, only 3 nations on Earth produce enough traditional missile ammo to fight long term. Which also means that only those who buy from these 3 have emergency option for additional largely unlimited stock just in case.
(Another snab at Europe and those who buy rafales in particular).