Are Engineers Too Weak? Direct Mass Production of Instruments

Suddenly traveled through time? He was gifted since childhood and became an engineer when he was just ten years old. Looking forward to testing magic only to be told that you can't use the spell? It's too economical to have a physique that can only use magic weapons. What does it mean that my master is the only magic weapon master in the world? Then we can only produce magic weapons. It gave them a little shock.