Mass producing or mass buying?
I doubt Iran has the sophistication to actually produce these. It would seem more realistic that Russia or China is producing them.
It is possible that Iran might be buying the parts from China or Russia and assembling the torpedoes in Iran.
The North Koreas are helping them.
NEVER doubt the ability of our enemies when it comes to producing weapons. We have made that mistake too many times at too many lives.
The Clinton Legacy continues to contribute to our demise.