This is a little strange.

Yes it is

DeepL translates the Japanese as:
If we get involved, it's not just dross, it's chakras.

チャカ (chaka) is a slang term meaning "pistol/handgun", which DeepL translated phonetically as chakra.
ドス (dosu) means "knife" or "dagger". I think it was translated phonetically also.

So, while I can't make it more idiomatic, the meaning comes out to something like:
If we get involved with them, it probably won't be just knives, but also guns that we'll have to worry about.

@AlanF_US Can you think of a better way to express this, based on what I described? I think this really could use some editing

Mess with them, and they won't just pull shivs on you. They're probably packing heat.

Note that I don't know Japanese, so I'm just paraphrasing what you proposed.

Perfect, thanks

@JimBreen Should I leave it as is or can I change it? I don’t think this is correct without at least some punctuation.

I'd go for something like AlalF_US's version. Maybe: "Mess with them, and they won't just pull shivs on you; they're probably packing heat."
We're using this sentence pair as the key example for both チャカ and ドス, so it will be good to get it improved.

I 've changed it already. Feel free to fiddle with it.

That’s exactly what I wanted to do, thanks

チャカが出てきそう...

This doesn't really imply "packing heat," does it?
It's more like "they'll likely pull out pistols," isn't it?

I think the meaning is still there

It's highly colloquial so it may be suitable for "チャカが出てきそうだ".