For example,massive production of heavy armor, arrows, swords and other steel weapons implies massive production of steel,right?But if they were nomadic then how did they organize a production of ironstone and further manufacturing? Some people argue that they used weapons of conquered nations but I find this point rather weak.
You might be interested in some previous threads on Mongol weapon and metal acquisition:
How did nomadic people like the mongols get the metal for their weapons? - 13 comments, over 1 year old.
A flaired commenter in this thread goes into the evidence for Mongol metalworking and the evolution of ore mining prehistoric, ancient, and medieval steppe peoples.
Who made the weapons and armor used by the Mongols during their conquests in the 1200s? Related question, Were the Mongols as opposed to industrial pursuit as they were agains agriculture? How does nomadic lifestyle reconcile with the need for weapons industries? - 18 comments, over 2 months old.
Commenters in this thread analyzes the nomadic lifestyle that the Mongols lived and how they interacted with landed peoples to answer the question.
Mongol Military under Genghis khan mainly consisted of Archers.But since they were living in Steppe how did they get the materials for their Arrows? And how did they replenish the arrows during a war in a distant country? - 27 comments, over 1 year old.
The commenters in this thread briefly address the availability of wood in Mongolia and the steppes before going off-topic an discussing Mongol tactics, organization, weapons, and the agricultural decline that followed their early conquests.
Here's my answer from an earlier thread on the same subject: