Ruby Grenade

A ruby grenade is an incendiary device favored by Sky Pirates, but they are not an uncommon weapon.

They are a round cartridge system, with a pin on one end and a latch opposite. When one pulls the pin the latch comes out and the bomb explodes after a delay. The blast radius is dependent on the quality of Ruby used. The explosion also warps metal, and are sometimes used as makeshift demolition charges.