And what goes a round, comes around. Of course, it is dependent on just how institutionalized the gun manufacturers have become; a publicly traded corporation is not going to necessarily have the same point of view. However, for those that are still owned and run by private individuals - they can just as easily decide they no longer want to sell to the gov agencies etc.
I have been saying for a long time that we should not have allowed our major business interests and resources to be bought up by foreigners I wonder just how much of the gun industry is actually owned by foreign interests with differing ideology to ours.