[solidsnack9000]

Not being able to supply one's own arms doesn't mean one doesn't buy them, just that they cost more and that one's leverage in alliances is greatly reduced. This is the situation many countries have been in, vis-a-vis the US -- Germany and Britain and Egypt and so many others -- for decades.

There are other countries out there who've thought through this problem. It's unlikely Russia depends on anyone for arms. I'm sure Israel is able to supply much its own munitions -- perhaps the US will end up buying from them.