FirstHokage
The theory is nice but I really hope you don’t mess with nativity. I don’t know whether you want to write the full Naruto storyline but if you go with the route of MC making his shadow clones as weapons and arming other shinobi, You will loose lot of plot. The main reason shinobi fight is for resources. If he makes 24 of these chakra weapons then he will poke a hole in the current market. If there is no demand, the merchants won’t hire shinobhi as militia for mines as there is less demand. Hence no point in acquisition. You might think 24 is less if we include all villages by these type of metal mines are only constantly fought over by big villages like leaf, lightning etc.