Goretooth 44G

Overview
"A massive chainsaw inspired by the "chain swords" from many fantasy RPG games. Mechanics designed this monster out of a desire to combine the brute impacting force of a sword with the continuous destructive ability of a chainsaw. Starting with a scrapped Stihl 090, mechanics lengthened the guide bar to roughly the same length as a Katana, and bolted a leather-bound pipe to the base to act as a hilt. In order to make it possible to wield the saw like a sword, mechanics reduced the engine size by half to reduce its weight. Razor-edged carbon-steel teeth were used on the chain to compensate for the reduced RPM of the engine. Take a swing at a zombie with one of these, and when you see the damage it does, you'll likely think you had a Dusk Razor in your hand."