Aries: brass knuckles

Taurus: hatchet

Gemini: double pistols

Cancer: katana

Leo: grenade

Virgo: noose

Libra: spiked cuffs

Scorpio: rocket launcher

Sagittarius: crossbow

Capricorn: bread knife (LMAO)

Aquarius: cyanide

Pisces: syringe

A/N: Credits to tysonwoods for the idea!