It's quite evident their point is that they don't want gun control and have pre-committed to whatever opinions are necessary to prevent it, including an opinion as absurd as "having to manufacture their own firearms would not be a significant impediment to their operations."

Mass synthesis of the drugs that cartels produce is trivial (that's why they produce them)

Putting drugs on trucks is trivial (that's why they do that)

Rudimentary semi-submersible vessels are impressive but you only need a few and they're not that hard to make (again, that's why they make em)

The telecom stuff they do is legitimately pretty impressive, but this too is just significant capex for long term benefit -- not so with self-made guns which are significant capex and you get out the other side a low volume of low-quality, non-dependable, often-breaking guns.