Not even the US can stand against China by itself...
The EU still has a large military industrial base getting revitalised as we speak, it didn't rot, it simply didn't need to pump out massive amounts of gear until this point.
Poland, Germany, France, Spain, Italy, Sweden, Finland, Czechia, etc. all have different kinds of weapons manufacturers. You can even include the UK, and Norway in the mix even though they aren't in the EU.