The days of nationalized French defense companies and state arsenals have been over for quite a while. Assuming I didn't make any mistakes:

GIAT was privatized, then renamed to Nexter, then merged with German KMW to form European KNDS and now it's about to do an IPO.

All of the French aerospace industry (including missiles) bar Dassault and Thales is inside Airbus.

Arquus was bought by Belgian John Cockerill.

I could probably cite more if I dug deeper, but while we still have French defense companies like Dassault, Naval Group and Thales, a fair amount of our defense industry is no longer exclusively French owned.

And if the French government or owner starts getting uppity, you could always take a page from the Swedes and how they Kockums the shit out of ThyssenKrupp.