関わり合いになったら、ドスどころかチャカが出てきそうだ。

、。

If you get involved, it won't just be knives — guns'll come out.

Literal

Involvement [to-に] became-[conditional-たら], dagger [let-alone-どころか] pistol [subject-が] come-out-[likely-そうだ].

Underworld slang packed into one sentence. ドス is a short blade or dagger associated with yakuza. チャカ is criminal slang for a handgun. ~どころか escalates: 'far from just X, it'll be Y (something worse).' The whole sentence warns about getting mixed up with dangerous people, delivered in casual male speech.