Even if they manufactured guns for themselves, iron and brass which guns are made from and saltpeter which black gunpowder is made from are not produced in Saika, and there is no material to suggest the source of their supply and others.
仮に鉄砲を自前で作成していたとしても、雑賀には鉄砲の材料となる鉄、真鍮、黒色火薬の材料となる硝石が生産されておらず、入手経路等を示す資料は解っていない。