Munin is Little Jack's trusty firearm that never leaves his side. Â Its revolving bronze cartridge below the main body can be rotated to whatever setting Little Jack needs for the situation. Â They include miniature missiles, lasers, stun ray, among others. Â The cartridge can be changed for another with different abilities should Little Jack have a need for alternate ammunition. Â Munin's sister gun, Hunin, went missing years ago when it was taken by one of Little Jack's former partners in the gang he used to belong to.