You should first get rid of the defeatist ideology. Turkey is a good example for you.
Bro, this is kind of wrong. Let me give you some examples.
Şakir Zümre
He found a factory and started to produce bombs that can be launched from airplanes in
1925. Exported to Western countries.
Nuri Demirağ.
He found a factory and started to produce airplanes in
1936. Exported to Western countries.
Nuri Killigil.
He founded a factory and produced various weapons, bombs, ammunition in 1930s/1940s.
Vecihi Hürkuş.
He found a factory and started to produce airplanes in
1920s.
There were many examples like these, however in 1950s. America gave Turkey lots of military equipment after the WW2 under name of Marshal Aid.... then Turkey ceased it's indigenous productions.
After the invasion of Cyprus, US sanctions came to place and it was a wake up call for Turkey. Some of the new firms founded yet, they were in baby steps...
Then Erdoğan came and kind of refueled the ambitions and Turkey started to produce.